68.
Zaliza (II) oxide FeO- black crystalline river, not rooted in water and meadows. FeO based on Fe (OH) 2.
Otrimannya. Oxide of zaliza (II) can be distinguished by different modifications of magnetic zaliznyak with oxide in carbon (II):
Cheerful authorities.Є basic oxide. Reacting with acids, setting salts:
Hydroxide zaliza (II) Fe (OH) 2- crystal speech of white color.
Otrimannya. Hydroxide salt (II) is included from the salts of bivalent salt during the development of meadows:
Cheerful authorities. Basic hydroxide. Enter at the reaction with acids:
On powder Fe (OH) 2 is oxidized to Fe (OH) 3:
Zaliza (III) oxide Fe2O3- A river of a brown color, grows in nature at the viglyadi of red zaliznyak, unrepentant at the water.
Otrimannya... In case of vipalennial fever:
Cheerful authorities. Viyavlya weak amphoteric power. With the interaction with the meadows, I set the salt:
Zaliza (III) hydroxide Fe (OH) 3- a river of red-brown colorah, not rooted near the water and overflow in the meadow.
Otrimannya... Dissolve the oxidized zaliza (III) oxide and zaliza (II) hydroxide.
Cheerful authorities.Є amphoteric z'єdnannyam (with the magnificent revelations of the main powers). Vipada in siege with diya meadows on a salt of trivalent zaliza:
Bivalent salt salt to possess the interaction of metal zaliza with common acids. The stench is very hydrolyzing, so the water breakdowns are energy sources:
When food is heated at 480 ° C, it expands, and the following oxides are soluble:
With the development of the sulfate of zaliza (II), the hydroxide zaliza (II) is established:
Confirm crystallog_drate - FeSO4-7H2O (green vitriol). Chloride zaliz (III) FeCl3 - crystalline river of dark brown color.
Cheerful authorities. Rozchinniy at the water. FeCl3 vyavlya oxidized power.
Vidnovlyuvachi - magnesium, zinc, water, oxidized without heating.
Zalizo is an element of the secondary group of the eighth group of the fourth period of the periodic system of chemical elements D. I. Mendeleva atomic number 26. Signed by the symbol Fe (Latin Ferrum). One of the most widespread metals in the earth's crust (the other is aluminum). Metal middle activity, lead.
The main stages of oxidation - +2, +3
It is simple to speak of zalizo - a kuvannya to metal of a medium-white color with a high chemical reactionary building: it is brightly corrosive at high temperatures, or at high lightness on the occasion. It’s easy to burn in a pure sourness, but in a highly dispersed mill, it’s self-borrowing.
Cheerful power of simple speech - zaliza:
Іrzhavinnya and mine in kisnі
1) On the other hand, it is easy to oxidize in the presence of a doctor (іrzhavinnya):
4Fe + 3O 2 + 6H 2 O → 4Fe (OH) 3
Roasting zaliznyi burns at sour, setting scale - oxide zalizny (II, III):
3Fe + 2O 2 → Fe 3 O 4
3Fe + 2O 2 → (Fe II Fe 2 III) O 4 (160 ° С)
2) Due to high temperatures (700-900 ° C), it reacts with water vapor:
3Fe + 4H 2 O - t ° → Fe 3 O 4 + 4H 2
3) Zalizo reacts with non-metals when heated:
2Fe + 3Cl 2 → 2FeCl 3 (200 ° С)
Fe + S - t ° → FeS (600 ° С)
Fe + 2S → Fe + 2 (S2-1) (700 ° C)
4) A number of strains cost more water, reacting with dilutions of HCl and H 2 SO 4 acids, while salts of saline (II) are established and water is seen:
Fe + 2HCl → FeCl 2 + H 2
Fe + H 2 SO 4 (pink) → FeSO 4 + H 2
In concentrated oxidizing acids, it is only possible to break out when heated, but immediately go to the cation Fe 3+:
2Fe + 6H 2 SO 4 (conc.) - t ° → Fe 2 (SO 4) 3 + 3SO 2 + 6H 2 O
Fe + 6HNO 3 (conc.) - t ° → Fe (NO 3) 3 + 3NO 2 + 3H 2 O
(in the cold, concentrated nitric and sirchan acid pass
Zal_zniy flowers, zenureniy at blakytnyy rozchin honey vitriol, step by step to be covered with nalot of red metal honey.
5) They threw a lot of money to stand right for a new range of salts.
Fe + CuSO 4 → FeSO 4 + Cu
The amphotericity of the saline is manifested only in concentrated meadows when there is boil:
Fe + 2NaOH (50%) + 2H 2 O = Na 2 ↓ + H 2
and siege of sodium tetrahydroxoferate (II).
Technic zalizo- fusion of zaliza with coal: chavun revenge 2.06-6.67%, steel 0.02-2.06% C, often the presence of some natural houses (S, P, Si) and piece special additives (Mn, Ni, Cr), which are introduced, so that alloys are technically needed corny power- hardness, thermal and corrosion resistance, malleability and in. .
Domain process virobnitstva chavun
The domain process is virobnitstva chavun to become such stages:
a) preparation (vipal) of sulfide and carbonate ores - transfer to oxide ore:
FeS 2 → Fe 2 O 3 (O 2,800 ° C, -SO 2) FeCO 3 → Fe 2 O 3 (O 2, 500-600 ° C, -CO 2)
b) burning coke with hot dutt:
С (coke) + O 2 (twirl) → С 2 (600-700 ° С) С 2 + С (coke) ⇌ 2СО (700-1000 ° С)
c) renewal of oxide ore with foul gas CO after:
Fe 2 O 3 → (CO)(Fe II Fe 2 III) O 4 → (CO) FeO → (CO) Fe
d) carbonizing the salt (up to 6.67% C) and melting the chavun:
Fe (t ) →(C(coke)900-1200 ° C) Fe (w) (chavun, melting point 1145 ° C)
In the chavun, the viglyad grains have cementite Fe 2 C and graphite.
Steel production
Chavun is transformed into steel at special furnaces (converter, open-hearth, electric), which is carried out by the method of heating; process temperature 1700–2000 ° С. Pouring the liquor, mixed with sour, should be brought to vigoryanny from the chavun of oversized carbon, as well as water, phosphorus and silicon from the viglyad oxides. With a large amount of oxide, it can be caught in the view of gases, which enter (CO 2, SO 2), or it can be easily absorbed into the slag - the sum of Ca 3 (PO 4) 2 і CaSiO 3. For the removal of special steels, add lightweight additives of other metals.
Otrimannya pure salinity in industry - electrolysis of salt salinity, for example:
FeСl 2 → Fe ↓ + Сl 2 (90 ° С) (elektroliz)
(see and іnshі special methods, In addition, the renewal of oxides in the water).
It is clear that it is stagnant in the production of special alloys, when the cores of the electro-magnetic and transformers are prepared, the chavun is in the production of the light and steel, the steel is the construction and the instrumental materials, including the number.
Zaliza (II) oxide F eO ... Amphoteric oxide with a great range of basic powers. Chorniy, maє іonnu budovu Fе2 + O2-. When he warmed up, the sprinkle folded up, then again it was established. Chi doesn’t pretend when you’re going to sleep. Chi does not react with water. To lay down with acids, to float from meadows. It is more likely to be oxidized in vologous povitri. Introduce water, coke. Take the fate of the blast furnace process for chavun. Stagnate as a component of ceramics and mineral farbs. Equivalent reaction:
4FеО ⇌ (Fe II Fe 2 III) + Fe (560-700 ° С, 900-1000 ° С)
FeO + 2HC1 (rozb.) = FeC1 2 + H 2 O
FeO + 4HNO 3 (conc.) = Fe (NO 3) 3 + NO 2 + 2H 2 O
FеО + 4NаОН = 2Н 2 O + Na 4FeO3 (chervonia.) trioxoferrate (II)(400-500 ° C)
FeO + H 2 = H 2 O + Fe (extra pure) (350 ° C)
FeO + C (coke) = Fe + CO (vische 1000 ° C)
FeO + CO = Fe + CO 2 (900 ° C)
4FеО + 2Н 2 O (vologa) + O 2 (povitrya) → 4FеО (ВІН) (t)
6FеО + O 2 = 2 (Fe II Fe 2 III) O 4 (300-500 ° С)
Otrimannya v laboratory: Thermal distribution of z'єdnan zaliza (II) without access to:
Fe (OH) 2 = FeO + H 2 O (150-200 ° C)
FeCO3 = FeO + CO 2 (490-550 ° C)
Iron oxide (III) - zaliza ( II ) ( Fe II Fe 2 III) O 4 ... Substrate oxide. Chorniy, maє ionnu budovu Fe 2+ (Fe 3+) 2 (O 2-) 4. Termichno stiyka up to high temperatures. Chi does not react with water. Build up with acids. We will be renewed with water, we will bake with zalizom. Take the fate of the blast-furnace process virobnitstva chavun. The component of mineral farbs ( golden red lead), ceramics, color cement. Product of special oxidation of the surface of steel virobes ( chorninnya, voroninnya). Behind the warehouse there is a brownish yellow and dark scale on the hallway. The overstretching of the gross formula Fe3O4 is not recommended. Equivalent reaction:
2 (Fe II Fe 2 III) O 4 = 6FеО + O 2 (in food 1538 ° С)
(Fe II Fe 2 III) O 4 + 8HC1 (rozb.) = FeC1 2 + 2FeC1 3 + 4H 2 O
(Fe II Fe 2 III) O 4 + 10НNO 3 (conc.) = 3Fе (NO 3) 3 + NO 2 + 5Н 2 O
(Fe II Fe 2 III) O 4 + O 2 (powder) = 6Fе 2 O 3 (450-600 ° C)
(Fe II Fe 2 III) O 4 + 4H 2 = 4H 2 O + 3Fе (especially pure, 1000 ° C)
(Fe II Fe 2 III) O 4 + CO = ZFeO + CO 2 (500-800 ° C)
(Fe II Fe 2 III) O4 + Fe ⇌4FеО (900-1000 ° С, 560-700 ° С)
Otrimannya: zgoryannya zaliza on weekends.
magnetite.
Zaliza (III) oxide F e 2 Pro 3 ... Amphoteric oxide from the majestic revelations of the main powers. Red-brown, maє ionnu budovu (Fe 3+) 2 (O 2-) 3. Thermally stable up to high temperatures. Chi doesn’t pretend when you’re going to sleep. Amorphous hydrate Fe 2 O 3 nН 2 Pro. Reacts with acids and meadows. Introduce monoxide in carbon, melted with zaliz. Alloy with oxides of other metals and solidified sub-oxides. spinels(Technical products are called ferites). Stagnate yak sirovin with vyplavtsi chavun in a blast-furnace process, a catalyst for polishing amyaku, a component of ceramics, coloric cements and mineral headlamps, with thermal sound of steel structures, as a sound image for a magical image
Equivalent reaction:
6Fе 2 O 3 = 4 (Fe II Fe 2 III) O 4 + O 2 (1200-1300 ° C)
Fe 2 O 3 + 6HC1 (rozb.) → 2FeC1 3 + DT 2 O (t) (600 ° C, p)
Fe 2 O 3 + 2NaOH (conc.) → H 2 O + 2 NaFeO 2 (chervonia.)dioxoferrate (III)
Fe 2 Pro 3 + MO = (M II Fe 2 II I) O 4 (M = Cy, Mn, Fe, Ni, Zn)
Fe 2 O 3 + DT 2 = DT 2 O + 2Fе (extremely pure, 1050-1100 ° C)
Fe 2 O 3 + Fe = ZFeO (900 ° C)
3Fе 2 O 3 + CO = 2 (Fe II Fe 2 III) O 4 + CO 2 (400-600 ° C)
Otrimannya in the laboratory - thermal distribution of salts of zaliza (III) for the next meal:
Fe 2 (SO 4) 3 = Fe 2 O 3 + 3SO 3 (500-700 ° C)
4 (Fe (NO 3) 3 9 Н 2 O) = 2Fе a O 3 + 12NO 2 + 3O 2 + 36Н 2 O (600-700 ° С)
At nature - oxide ore zaliza hematite Fe 2 O 3 i limonite Fe 2 O 3 nН 2 O
Hydroxide zaliza (II) F e (BIN) 2. Amphoteric hydroxide from the majestic rehearsals of the main powers. Biliy (inodi from greenish vidtinkom), links Fe - BIN are importantly covalent. Thermally unstable. It is easy to oxidize in the dark, especially in the dark. Indiscriminate at the water. Reagent with diluted acids, concentrated meadows. Typical lead. An industrial product for іrzhavinnі zaliza. Get stuck in the active population of Zalizonikel batteries.
Equivalent reaction:
Fe (ON) 2 = FeO + H 2 O (150-200 ° C, in atm N 2)
Fe (OH) 2 + 2HC1 (rozb.) = FeC1 2 + 2H 2 O
Fe (OH) 2 + 2NаОН (> 50%) = Na 2 ↓ (blue-green) (boiling)
4Fе (ОН) 2 (suspension) + O 2 (over) → 4FеО (ОН) ↓ + 2Н 2 O (t)
2Fе (ОН) 2 (suspension) + Н 2 O 2 (pink.) = 2FеО (ОН) ↓ + 2Н 2 O
Fe (OH) 2 + KNO 3 (conc.) = FeO (OH) ↓ + NO + KOH (60 ° C)
Otrimannya: precipitation from the range of meadows or hydrate amiaku in the inner atmosphere:
Fe 2+ + 2OH (rozb.) = Fe (OH) 2 ↓
Fe 2+ + 2 (NH 3 H 2 O) = Fe (OH) 2 ↓+ 2NH 4
Metagidroxid zaliza F eO (BIN). Amphoteric hydroxide from the majestic rehearsals of the main powers. Light brown, the links Fe - Pro and Fe - BIN are importantly covalent. It takes about an hour to heat up without melting. Indiscriminate at the water. The gap between the eyes is brown amorphous to the polyhydrate Fe 2 O 3 nH 2 O, which, when vitrified before the breeding is made with the help of a punch, or when hanging, go over to FeO (OH). Reacting with acids, solid meadows. Weak oxidizing agent. Relate to Fe (OH) 2. An industrial product for іrzhavinnі zaliza. It is stagnant as the basis of the minerals and minerals, poglinach gas, which comes in, a catalyst in organic synthesis.
Z'єdnannya warehouse Fe (OH) 3 not seen (not trimmed).
Equivalent reaction:
Fe 2 O 3. nН 2 O → ( 200-250 ° C, -H 2 O) FeO (OH) → ( 560-700 ° С on power, -H2O)→ Fe 2 Pro 3
FeO (OH) + ZNS1 (rozb.) = FeCl 3 + 2H 2 O
FeO (OH) → Fe 2 O 3 . nH 2 O-coloïd(NaOH (conc.))
FeO (OH) → Na 3 [Fe (BIN) 6]bily, Nа 5 і 4 for example; in both vipads vipadaє blue product of the same warehouse that budovi, KFe III. Laboratory sieges are called berlinska blake, abo turnbulova blue:
Fe 2+ + K + + 3- = KFe III ↓
Fe 3+ + K + + 4- = KFe III ↓
Chemical names of specific reagents and reaction product:
Up to 3 Fe III - calcium hexacyanoferrate (III)
Up to 4 Fe III - calcium hexacyanoferrate (II)
КFе III - hexacyanoferrate (II) zaliza (III) calium
In addition, a good reagent for іoni Fe 3+ є tiocyanat-ion NСS -, zalizo (III) is used with it, and it is yaskravo-chervone ("crooked") storage:
Fe 3+ + 6NСS - = 3-
With a reagent (for example, in the KNCS salt), it is possible to navigate through the bay (III) near the water supply, as it passes through the bay pipes, in the middle of the middle.
I will add two oxides, for which valences II and III are shown, the oxidation stage (+2) and (+3) is obvious.
VALUE
Zaliza (II) oxide the wits have a black color powder (Fig. 1), which can be laid out when the heating is done and that the products are distributed when the heating is done.
The food is chemically inactive. In viglyadі powder is pyrophorated. Chi does not react with cold water. Vyavlya amphoteric power (from the majestic revelations of the main ones). It is easy to oxidize sour. Renewed with water and coal.
Small. 1. Oxide of zaliza (II). The name of the viglyad.
VALUE
Є firm speech of red-brown color in different trigonal modification or dark brown color in different cubic modification, yak the most reactionary (Fig. 1).
Thermally stable. Melting temperature 1562 o.
Small. 1. Oxide of zaliza (III).
Chi does not react with water, hydrate amiaku. Vyavlya amphoteric power, reacting with acids, meadows. Introduce water, monoxide in carbon, gold.
Chemical formula for zaliza oxide
The chemical formula is for the oxide of zaliz (II) FeO, and for the oxide of zaliz (III) - Fe2O3. The chemistry formula shows a good and small storage of a molecule (small and different atoms in them). The chemical formula can be used to calculate the molecular weight of the speech (Ar (Fe) = 56 amu, Ar (O) = 16 amu):
Mr (FeO) = Ar (Fe) + Ar (O);
Mr (FeO) = 56 + 16 = 72.
Mr (Fe 2 O 3) = 2 × Ar (Fe) + 3 × Ar (O);
Mr (Fe2O3) = 2 × 56 + 3 × 16 = 58 + 48 = 160.
Structural (graph) formula of oxide zaliza
Structural (graphic) formula of speech є on the spot. I’ll show you how the atoms are tied together with all the molecules. Below are graphical formulas of oxides of zaliz (a - FeO, b - Fe 2 O 3):
Set up tasks
APPENDIX 1
| Zavdannya | Having given the analysis of the word, we set it up to enter the warehouse: sodium with a mass fraction of 0.4207 (or 42.07%), phosphorus with a mass fraction of 0.189 (or 18.91%), mussel with a fraction of 0.3902 (or 39 02 %). Know the formula with half-way. |
| Decision | Significantly, the number of sodium atoms in the molecule through "x", the number of phosphorus atoms through "y" and the number of atoms through "z". It is known that the type of atomic mass of sodium, phosphorus and sour (the value of atomic mass, uziatі z Periodicheskiy tableі D.I. Mendelev, let's round up to a whole number). Ar (Na) = 23; Ar (P) = 31; Ar (O) = 16. Vidsokovy instead of elements distributed to different types of nuclear power. In such a rank, we know the relationship between the number of atoms in a molecule with a half: Na: P: O = 42.07 / 39: 18.91 / 31: 39.02 / 16; Na: P: O = 1.829: 0.61: 2.43. The smallest number is acceptable for one (so that all numbers are distributed on least number 0,61): 1,829/0,61: 0,61/0,61: 2,43/0,61; Otzhe, the simplest formula is with sodium salt, phosphorus and acid sodium hydroxide Na 3 PO 4. Tse sodium phosphate. |
| View | Na 3 PO 4 |
APPENDIX 2
| Zavdannya | The molar mass with nitrogen in the water supply is 32 g / mol. By starting the molecular formula of the speech, the mass fraction of nitrogen in the yak becomes 85.7%. |
| Decision | The mass fraction of the element X in the molecule storage HX is protected according to the following formula: ω (X) = n × Ar (X) / M (HX) × 100%. Numbered for the mass part of the city at the end of the day: ω (H) = 100% - ω (N) = 100% - 85.7% = 14.3%. Apparently, there are a number of moths of elements that enter the warehouse with a half-hour for "x" (nitrogen), "y" (water). Todi will be given the next rank (the value of the new atomic mass, taken from the Periodic tables of D.I. Mendelev, we will round up to whole numbers): x: y = ω (N) / Ar (N): ω (H) / Ar (H); x: y = 85.7 / 14: 14.3 / 1; x: y = 6.12: 14.3 = 1: 2. To mean the simplest formula with nitrogen and water content in the form of NH 2 i molar masu 16 g / mol. To know the correct formula for organic spoluces, we know how to find out the ratio of molar mass: M substance / M (NH 2) = 32/16 = 2. Otzhe index of atoms in nitrogen and water is not very important, tobto. formula of speech matime viglyad N 2 H 4. Tse hydrazine. |
| View | N 2 H 4 |
Cheerful authorities
Cheerful authorities
Soli Fe (II)
Cheerful authorities
Cheerful authorities
FeO - Fe (II) oxide.
Refractory black pyrophoric powder, which cannot be found near water.
Behind the chemical powers FeO is the basic oxide. Interaction with acids, solubilizing salts:
FeO + 2HCl = FeCl 2 + H 2 O
4FeO + O 2 = 2Fe 2 O 3
3FeO + 10HNO 3 = 3Fe (NO 3) 3 + NO + 5H 2 O
Fe (OH) 2 - Fe (II) hydroxide- Solid speech of the white color, not rooted in the water.
Behind the chemical power is a weak base, but it easily reacts with acids and does not react in meadows. Fe (OH) 2 - inconsistency of speech: when heated without access, it will fold, and on every other moment it will oxidize:
Fe (OH) 2 = FeO + H 2 O (t)
4Fe (OH) 2 + O 2 + 2H 2 O = 4Fe (OH) 3
green-green storms
Most practically important є: FeSO 4 FeCl 2 Fe (NO 3) 3 FeS FeS 2.
It is characteristic to establish complex and sub-base salts with salts of foreign metals and ammonia:
Fe (CN) 2 + 4KCN = K 4
FeCl 2 + 2KCl = K 2
Sil Mora
(NH 4) 2 SO 4 FeSO 4 6H 2 O
Zalizny vitriol
Hydration ion Fe 2+ is greenish green.
1. The range of Fe 2+ salts at water levels undergo hydrolysis due to the definitions of the acidic middle range:
Fe 2+ + H 2 O ↔ FeOH + + H +
2. Vyavlyayut foreign powers typical salts (ion-exchange vzaєmodii):
FeS + 2HCl = FeCl 2 + H 2 S
FeCl 2 + 2NaOH = Fe (OH) 2 ↓ + 2NaCl
FeSO 4 + BaCl 2 = FeCl 2 + BaSO 4 ↓
3. Easily oxidized by strong oxidizing agents
Fe 2+ - 1? → Fe 3+
10Fe +2 SO 4 + 2KMnO 4 + 8H 2 SO 4 = 5Fe +3 (SO 4) 3 + K 2 SO 4 + 2MnSO 4 + 8H 2 O
4. Yakisnі reactions for detecting cations Fe 2+:
a) 3Fe 2+ + 2 3- = Fe 3 2 ↓
chervona krov'yana sil turnbulev blue
(dark blue siege)
b) in the middle of a meadow the greens of Fe (OH) 2 sieges, which are green in every step, and then change to the Fe (OH) 3 storms.
З'єднання Fe (III)
Fe 2 O 3 - zaliza (III) oxide
Chervono-Buri powder, not razchinniy at water. Nature has a “chervony zaliznyak”.
Fe 2 O 3 - basic oxide with signs of amphotericity.
1. The main power is manifested in the capacity to react with acids:
Fe 2 O 3 + 6HCl = 2FeCl 3 + 3H 2 O
Fe 2 O 3 + 6HNO 3 = 2Fe (NO 3) 3 + 3H 2 O
2. At water levels of meadows, Fe 2 O 3 does not differ, but when fused with solid oxides, meadows and carbonates, ferrites are approved:
Fe 2 O 3 + CaO = Ca (FeO 2) 2 (t)
Fe 2 O 3 + 2NaOH = 2NaFeO 2 + H 2 O (t)
Fe 2 O 3 + MgCO 3 = Mg (FeO 2) 2 + CO 2 (t)
3. Fe 2 O 3 - useful syruvina for removing salinity from metallurgy:
Fe 2 O 3 + 3C = 2Fe + 3CO or Fe 2 O 3 + 3CO = 2Fe + 3CO 2
Fe (OH) 3 - hydroxide zaliza (III)
Fe (OH) 3 - the base is even weak (the base is weak, not Fe (OH) 2). Fe (OH) 3 maє amphoteric character:
1) Reactions with acids are easy to carry out:
Fe (OH) 3 + 3HCl = FeCl 3 + 3H 2 O
2) Fresh precipitation of Fe (OH) 3 is found in hot concentrations of KOH or NaOH with hydroxocomplexes:
Fe (OH) 3 + 2KOH = K 3
In the puddle variety Fe (OH) 3, there can be oxidations to ferrates (salts are not seen in the vitriolic acid H 2 FeO 4):
2Fe (OH) 3 + 10KOH + 3Br 2 = 2K 2 FeO 4 + 6KBr + 8H 2 O
Soli Fe 3+
Practically important є:
Fe 2 (SO 4) 3, FeCl 3, Fe (NO 3) 3, Fe (SCN) 3, K 3
Typically, the setting of sub-base salts - golden galuns:
(NH 4) Fe (SO 4) 2 12H 2 O
KFe (SO 4) 2 12H 2 O
Salt Fe 3+ is often found in hard mill as well as in water. It will be explained by the obviousness of hydrated forms or products in hydrolysis.
VALUE
Zaliza (II) oxide the wits have a black color powder (Fig. 1), which can be laid out when the heating is done and that the products are distributed when the heating is done.
The food is chemically inactive. In viglyadі powder is pyrophorated. Chi does not react with cold water. Vyavlya amphoteric power (from the majestic revelations of the main ones). It is easy to oxidize sour. Renewed with water and coal.
Small. 1. Oxide of zaliza (II). The name of the viglyad.
Chemical formula for oxide zaliza 2
The chemical formula for oxide zaliza (II) FeO. The chemistry formula shows a good and small storage of a molecule (small and different atoms in them). The chemical formula can be used to calculate the molecular weight of the speech (Ar (Fe) = 56 amu, Ar (O) = 16 amu):
Mr (FeO) = Ar (Fe) + Ar (O);
Mr (FeO) = 56 + 16 = 72.
Structural (graph) formula for oxide zaliza 2
Structural (graphic) formula of speech є on the spot. I’ll show you how the atoms are tied together with all the molecules. Below is the graphical formula for the oxide of zaliza (II):
Set up tasks
APPENDIX 1
| Zavdannya | With neutralization of 25.5 g of the boundary monobasic acid and too much sodium hydrocarbonate, 5.6 l (n.u.) gas was too high. See the molecular formula for the acid. |
| Decision | We can write down the equal reaction of neutralization of the boundary monobasic acid and the overshoot of sodium hydrocarbonate in the zagalny viglyad: C n H 2n + 1 COOH + NaHCO 3 → C n H 2n + 1 COONa + CO 2 + H 2 O. Rosrakhumo is the amount of speech in carbon dioxide, which was seen in the course of the reaction: n (CO 2) = V (CO 2) / V m; n (CO 2) = 5.6 / 22.4 = 0.25 mol. For example, before the reaction n (CO 2): n (C n H 2n + 1 COOH) = 1: 1, tobto. n (C n H 2n + 1 COOH) = n (CO 2) = 0.25 mol. Rosrachuєmo molar mass of boundary monobasic acid: M (C n H 2n + 1 COOH) = m (C n H 2n + 1 COOH) / n (C n H 2n + 1 COOH); M (C n H 2 n +1 COOH) = 25.5 / 0.25 = 102 g / mol. The number of atoms in carbon in the molecule of a boundary monobasic acid is significant (the value of the atomic weights, taken from the Periodic tables of D.I. Mendelev, will be rounded to whole numbers: 12 - for carbon, 1 - for water and 16 for acid): M (C n H 2n + 1 COOH) = 12n + 2n + 1 + 12 + 16 + 16 +1 = 14n + 46; 14n + 46 = 102 g / mol; This means the molecular formula of the boundary monobasic acid C4H9COOH. |
| View | C 4 H 9 COOH |
APPENDIX 2
| Zavdannya | Set the molecular formula of the alkene, which seems to be 2.8 g of the amount given in 1120 ml (n.u.) chlorine water. |
| Decision | We can write down the reaction of adding chlorine water to alkene in a zagalny viglyad: C n H 2 n + HCl → C n H 2 n +1 Cl. Rozrakhumo number of words and chlorine water: n (HCl) = V (HCl) / V m; n (HCl) = 1.2 / 22.4 = 0.05 mol. According to the previous reaction n (HCl): n (C n H 2n) = 1: 1, so that. n (C n H 2n) = n (HCl) = 0.05 mol. Rosrahuєmo molar to mas alken: M (C n H 2n) = m (C n H 2n) / n (C n H 2n); M (C n H 2 n) = 2.8 / 0.05 = 56 g / mol. The number of atoms in carbon in an alkene molecule is significant (the value of individual atomic weights, taken from the Periodic tables of D.I. Mendelev, rounded to whole numbers: 12 - for carbon and 1 - for water): M (C n H 2 n) = 12n + 2n = 14n; 14n = 56 g / mol; This is the molecular formula for the alkene C4H8. |
| View | C 4 H 8 |
