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Topic Salts and MetalsAll problems and solutions as
pdf here.Learning objectives resp. question areas:
- from salze-01 : [translation unavailable]
- from salze-10 : stable ions to form
- from salze-20 : from ions salts to form
- Ab salze-30 : name given
- from salze-40 : draw ... Carbonate and so on.
- from salze-50 : characteristics
- from salze-60 : hydration shell
- from salze-70 : solubility product
- from salze-80 : [translation unavailable], electrolysis
- This forum has 42 topics, 42 replies, and was last updated 4 days, 22 hours ago by .
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- Most stable ions (Salze-10)The following atoms are given: aluminium, fluorine, 4Be, potassium, 52Te, neon, calcium, sulphur and nitrogen.
Determine the number of valence electrons from each atom and then determine the most common ion. - 1
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- 4 days, 22 hours ago
- Most common ions (Salze-11)List each of the most common ions that can be formed from the following elements:
(a) Sodium (b) Magnesium (c) Fluorine (d) Oxygen (e) Nitrogen (f) Aluminium - 1
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- 4 days, 22 hours ago
- Formation of salt formula (Salze-20)List all (binary) salt formulas that can be formed from the most common ions of the following elements:
Bromine, oxygen, potassium, aluminium, calcium and nitrogen - 1
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- 4 days, 22 hours ago
- Form salts of ions, 1 (Salze-21)What salts ('salt formulas') can be formed from the following ions:
Al3+ / NH+4 / Fe2+ / Fe3+ / Na+ / Mn2+ / O2- / S2- / NO3– / Br– / SO2-4 / H2PO4– / CO2-3 / PO3-4 - 1
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- 4 days, 22 hours ago
- Form salts of ions, 2 (Salze-22)What salts ('salt formulas') can be formed from the following ions:
Al3+ / NH+4 / Fe2+ / Fe3+ / Na+ / Mn2+ / O2- / S2- / NO3– / Br– / SO2-4 / H2PO4– / CO2-3 / PO3-4
Note: the ions are to be listed according to their charge, so first the simple positive, then the double positive, etc. And: as always: with a table, the thing becomes clearer. - 1
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- 4 days, 22 hours ago
- Ions, salt formula from name of the salt of which: (Salze-23)Please indicate the names of the following salts.
Name of the salt cation Lewis structure of the manufacture from materials salt formula Sodium sulphate Potassium nitrate Calcium phosphate Magnesium carbonate Ammonium chloride Blei(II)-sulfide Eisen(II)-oxide Eisen(III)-oxide Aluminium carbide Potassium permanganate Sodium acetate Aluminium oxide - 1
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- 4 days, 22 hours ago
- Forming different salts (Salze-24)Form the following salts from the neutral elements and write the balanced reaction equation:
- NaCl
- MgO
- KBr
- Al2O3
- Iron (II) oxide
- Iron (III) oxide
- Sodium oxide
- Calcium oxide
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- 4 days, 22 hours ago
- Form ions from salts (Salze-25)The following salts are given. What are the ions involved? Their number does not need to be determined.
- NaCl: Na+ / Cl–
- Al2O3
- MgO
- KBr
- FeO
- Fe2O3
- Na2O
- CaO
- (NH4)2HPO4
- Ca(H2PO4)2
- Fe(NO3)3
- Ba(ClO3)2
- Ca(OH)2
- Ca3(PO4)2
- Zn(HCO3)2
- LiCO3
- Na2H2P2O7
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- 4 days, 22 hours ago
- Name the following ions and salts (Salze-30)The following ions and salts are given. Name them by their name. Note that in the case of transition metals, the charge must be indicated in Roman numerals.
- NaCl:
- F– :
- SO2-4 :
- O2- :
- NaNO3 :
- Al2O3:
- FeO :
- Fe2O3 :
- NaS :
- C4- :
- CaO2:
- NaHCO3–:
- Na2SO4:
- NH4+:
- PbS:
- Al4C3:
- (NH4)(NO3):
- AlBr3 :
- Fe(NO3)3 :
- (NH4)2S :
- Fe3(PO4)2 :
- Fe(HPO4) :
- Fe(H2PO4)3 :
- Fe2(SO4)3 :
- Fe(HSO4)2 :
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- 4 days, 22 hours ago
- Magnesium tetroxide (Salze-32)Someone says MgO4 is a miracle cure for stupidity.
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- 4 days, 22 hours ago
- Polyatomic anions draw (Salze-40)Draw the following multiatomic anions:
- Sulphate
- Nitrate
- Carbonate
- Hydrogen sulphate
- Phosphate
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- 4 days, 22 hours ago
- Preparation of solution with a given concentration (Salze-50)Produce 0.4 liters of a 0.2 mol/l NaCl solution in the laboratory with a scale and measuring flask.
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- 4 days, 22 hours ago
- Coulomb force – Gravitational force (Salze-51)Someone claims that the gravitational forces in a salt are primarily determined by the gravitational forces (FG) of the ions involved. How much stronger is the pull due to the Coulomb force (Fc) compared to the gravitational force (FG)?
For the calculation, take the gravitational forces between a sodium ion and a chloridion. two ions equal to 2.82·10-10 m. - 1
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- 4 days, 22 hours ago
- Definition of hydration energy (Salze-61)Why is energy released when water attaches to ions?
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- 4 days, 22 hours ago
- Hydration shell, number (Salze-62)In the chemical laboratory is a solution, which with 1 M CuSO4 printed is.
What exactly does this mean? How was the solution made? How is the proportion cation – anion – particles of water ? - 1
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- 4 days, 22 hours ago
- Solubility product (Salze-70)The following salts are given. Formulate the solubility product.
- Fresh or chilled
- Calcium
- CaF2
- NH4Cl
- AlBr3
- Iron (III) oxide
- Calcium sulphate
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- 4 days, 22 hours ago
- Interpretation of the solubility product (Salze-71)Given is the solubility product of Lp(CaSO4) = 2·10-5 mol2/l2. Is a solution with c(Ca2+)= 10-2 mol/l and c(SO2-4) = 10-4 mol/l contains, not saturated, saturated or over-saturated?
Note : The following applies (to known masses):
— Saturated solution ionic product = Lp
— Unsaturated solution ionic product < Lp
— Supersaturated solution ionic product > Lp - 1
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- 4 days, 22 hours ago
- Calculation of solubility product, NaCl (Salze-72)100 grams of NaCl dissolves in 400 ml of water. Calculate the solubility product of NaCl
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- 4 days, 22 hours ago
- Calculation of solubility product, magnesium bromide (Salze-73)The solubility product of a magnesium bromide solution of which: 6.9·10-4 mol3/L3. Calculate of which:, how much grams itself magnesium bromide in a litres solving.
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- 4 days, 22 hours ago
- Calculation of solubility product, aluminium fluoride (Salze-74)The solubility product of an aluminium fluoride solution is 6.3·10-11 mol4/L4. Calculate how many grams of aluminium fluoride dissolve in a liter of water.
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- 4 days, 22 hours ago
- Calculation of solubility product, aluminium oxide (Salze-75)The solubility product of an aluminium oxide solution is 1·10-33 mol5/L5. According to the solubility product, it is very poorly soluble in water. Calculate exactly how much gram would dissolve in a liter of water.
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- 4 days, 22 hours ago
- From solubility product grams NaCl calculate (Salze-76)The solubility product of NaCl of which: Lp(NaCl) = 18.26 mol2/l2. Place two saturated fresh or chilled-solutions with the following: volumes I 'm here: a) 1.0 litres, b 0.3 litres
- 1
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- 4 days, 22 hours ago
- Solubility of lime (Salze-77)Given the solubility product of lime, Lp(CaCO3) = 4.8·10-9 mol2/l2. So how much lime dissolves in a bathtub of 200 litres?
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- 4 days, 22 hours ago
- Metal properties: magnetism (Salze-81)It is often claimed that magnetism is a typical metallic property.
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- 4 days, 22 hours ago
- Gap text of electrolysis (Salze-83)In the following text, the gaps a) , b) , c) etc. are to be meaningfully filled.
If you immerse two graphite electrodes in a zinc-coded solution and apply an equal voltage, an electric current flows. At the electrode connected to the minus pole, metallic zinc is formed, and at the electrode connected to the plus pole, iodine is separated. The processes running in the solution are now considered more closely.
Two electrodes plunge into the zinc-coding solution. One of these is directly connected to the minus pole, so it's loaded to a) . This electrode is called b) . It has an electron surplus and therefore attracts c) ions. These ions are called d) , in this example they are Zn2+ ions. From the secretion of zinc at the e) we can conclude that the zinc ions the cathode f) and become g) . Zn2+ + h) → h) .
The electrode connected to the pluspole is called A , it is charged B . It lacks electrons, so it attracts C) . These ions are called D) . For example, I-ions (iodidions). Apply to the anode And then they're going to break down each one of these into E and they're going to become iodine atoms that bind together into biatomic F .
2 G) → 2 I + G) ; 2 I → G) - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 1 (Salze-85)Copper is obtained electrolytically from Cu2+ – ions. In a electrolytic cells is a Cu2+ -withdrawn solution
30 min with a power intensity ofI = 2.5 A electrolytic. Calculate the separated mass m(Cu) at an electrolysis efficiency of 92.5%.
Note 1: m/M = I·t/(z·F)
Note 2: Assume 100% efficacy in a first step.
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 2 (Salze-86)A silver nitrate solution is electrolyzed at a current strength of 2.54 A. The mass of silver is released in 45 minutes. The efficiency is 90%.
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 3 (Salze-87)15 m2 a metal surface area should with a 35 µm thick chromic layer coated are. Chromes has a density of
7.15 g/cm3 .
(a) Calculate the mass of chromium to be excreted.
(b) Separation shall be made from an CrO3 – solution. How long to be electrolyzed if the current strength is 450 A And the effectiveness is 90%.
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 4 (Salze-88)How long must a electricity the strength 0.45 A flow, so that from a CuCl2 solution 3.5 g copper discharged are?
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 5 (Salze-89)How long does a current of 10 A have to flow (about the usual 'household current ') before electrons of a total mass of 1 kg are passed through the conductor cross-section?
Notes m(e–) = 9.1·10-31 kg, load 1e– = 1.602·10-19 C
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 6 (Salze-90)A shell with a surface of 120 cm2 should through electrolysis a silver nitrate solution a 0.2 mm thick silver transhipment received. Calculate the time required if the current strength is 10 A. The density of the silver is
10.5 g/cm3 .
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 7 (Salze-91)Calculate the thickness of the copper layer that a current of 5.8 A dissolves evenly in 3 hours on a sphere with a radius of 8.3 cm.
Note 1: The surface of a sphere is 4·pi·r2
Note 2: Coppering was carried out with a copper sulphate solution
Note 3: Dichte(Cu) = 8.9 g/cm3
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
- Salts, electrolysis, 8 (Salze-92)800 mg of copper at I=180mA should be removed from a copper sulphate solution at the cathode. Calculate (a) the time duration of electrolysis and (b) determines the volume of oxygen that is created simultaneously under normal conditions (298 K, 101300 N/m2).
The general gas equation is p·V=n·R·T, whereasR = 8.314 J/molK ,
Note: Identical exercise also in the subject of redox - 1
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- 4 days, 22 hours ago
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