WorksheetsХимия есеп
Total questions: 26
Worksheet time: 13mins
> The second group of cations includes cations:
Ba2+ Si2+ Cr3+
Pb2+ Hg2+ Ag2+
To+ NH 4+ Na+
Fe2+ Fe3+ Mn2+ Bi3+ Mg2+
The ionic strength of a 0.1 M sodium chloride solution:
0.01 M
0.1 M
0.001 M
0.0001 M
0.01 m ionic strength of hydrochloric acid solution:
0.00001 M
0.1 M.
0.01 M.
0,0001 М
The 0.01 m ionic strength of the chromium chloride solution (3) is equal:
0.008 М
0.1 M
0.001 M
0.06 M
The ionic strength of a 0.2 m sodium hydroxide solution:
0.3 M
0.2 M
0.1 M
0.5 M
The ionic strength of a 0.1 M magnesium sulphate solution:
0.6M
0.3 M
0.2 M
0.4 M
The ionic strength of a zinc sulphate solution is 0.01 m:
0.04 M
0.03 M
0.02 M
0.5 m
The ionic strength of an aluminum chloride solution is 0.1m:
0.7 M
0.6M
0.2 M
0.4 M
What is the molar concentration of an aqueous solution of hydrochloric acid, if the ionic strength of the solution is 0.01 m?
0.01 M
1.0 M
0.5 M
0.2 M
What is the molar concentration of zinc sulphate in solution if the ionic strength of the zinc sulphate solution is 0.4 m?
0.4 M
0.3 M
0.2 M
0.1 M
The ionic strength of a solution of aluminum chloride is 0.6 m. What is the molar concentration of aluminum chloride in this solution?
0.3 M
0.2 M
0.1 M
0.4 M
What is the pH of a 0.1 m hydrochloric acid solution?
1
2
3
4
What is the pH value of a 0.01 M hydrochloric acid solution?
1
2
3
1.5
At pH =8.0, the concentration of hydroxide ions is equal:
10-6 M
10-1 M
10-5 M
10-7 M
The hydrogen index (pH) of a buffer solution (pH) and a 0.1 m ammonium chloride solution, consisting of an equal volume of 0.1 m ammonia solution, is equal:
9.24
10.0
8.0
7.5
State the decomposition reaction of calcium carbonate:
CaCO3+H2SO4 → CaCO4+H2SO3
CaCO3+ 2HCl → CaSO4+ H2CO3
2CaCO3→ CaO+CO2
Ca+H2CO3→ CaCO3+H2
What is the pH of a solution containing 0.057 mol/l ammonia and 0.1 mol/l ammonium chloride?
0.5
8.0
9.0
5.0
at what pH value does the solution become alkaline?
1
5
7
10
Which of the following is not a buffer mixture?
CH3 COOH + CH3 COONa
NH4 Cl+NH3 - H2 O
Na2 CO3 +NaHCO3
NaOH +NaCl
The sixth group of cations includes
Al3+ Cr3+ Zn2+ As(III) As(V)
Cu2+ Hg2+ Co2+
To+ NH 4+ Na+
Fe2+ Fe3+ Mn2+ Bi3+ Mg2+
The first group of anions includes
SO32- , CO 2- , SO 2- , I- , S2- , SCN-
NO2- , NO3- , CH3 COO-
Br- , I- , S2- , SCN-
SO32- , CO 2- , SO 2- , S2 O 2- , CrO 2- , BO2- , C2 O42-
The second group of anions includes
SO32- , CO 2- , SO 2- , S2 O 2- , CrO 2- , BO2- , C2 O42-
Br- , I- , S2- , SCN-
NO2- , NO3- , CH3 COO-
SO32- , CO 2- , SO 2- , I- , S2- , SCN-
The third group of anions includes
SO32- , CO 2- , SO 2- , I- , S2- , SCN-
SO32- , CO 2- , SO 2- , S2 O 2- , CrO 2- , BO2- , C2 O42-
Br- , I- , S2- , SCN-
NO2- , NO3- , CH3 COO-
Group five cations include
Al3+ Cr3+ Zn2+ As(III) As(V)
To+ NH 4+ Na+
Pb2+ Hg2+ Ag2
Fe2+ Fe3+ Mn2+ Bi3+ Mg2
The fourth group of cations includes
Al3+ Cr3+ Zn2+ As(III) As(V)
Pb2+ Hg2+ Ag2
Fe2+ Fe3+ Mn2+ Bi3+ Mg2+
To+ NH 4+ Na+
The third group of cations includes:
Pb2+ Hg2+ Ag2+
Fe2+ Fe3+ Mn2+ Bi3+ Mg2+
Ba2+ Sr2+ Ca2+
To+ NH 4+ Na+
