200
Stolchlometry III Calculations Based on Concentrations of Solutions
4 Give the weight of metal ion in each of the following solutions
(a) 250 ml of 0 10 M CuSO 4
(e) 75 ml of 0 10 M A1C1 3
(b) 125 ml of 0 050 M CdCl 2
(f) 1 5 liters of 3 0 M AgNOj
(c) 50 ml of 0 15 M MgSO 4
(g) 2 0 liters of 0 333 M Fe 2 (SO 4 ) 3
(d) 50 ml of 0 075 M Na 2 SO 4
5 The density of a 7 00 M HC1 solution is 1 113 g/ml Find the percentage of HC1
by weight
6 (a) What is the percentage of HNO 3 by weight in a 21 2 M solution of HNO 3
whose density is 1.483 g/ml
9
(b) What is the molahty of this solution
9
7 If 3 0 liters of 6 0 M HC1 are added to 2 0 liters of 1 5 M HC1, what is the
resulting concentration
9 Assume the final volume to be exactly 5 0 liters
8 What volume of 15 0 M HNO 3 should be added to 1250 ml of 2 00 M HNO 3 to
prepare 14 0 liters of 1 00 M HNO 3
9 Water is added to make the final volume
exactly 14 0 liters
9 The density of a 2 04 M Cd(NO 3 ) 2 solution is 1 382 g/ml If 500 ml of water is
added to 750 ml of this solution, (a) what will be the percentage by weight of
Cd(NO 3 ) 2 in the new solution
9 (b) What will be its molahty'
10 If 40 00 ml of an HC1 solution is titrated by 45 00 ml of 0 1500 M NaOH, what
is the molanty of the HC1
9
11 We need 35 45 ml of an NaOH solution to titrate a 2 0813 g sample of pure
benzoic acid, HC 7 H 5 O 2 What is the molanty of the NaOH solution'
12 What is the molanty of a K 2 C 2 O 4 solution if 35 00 ml of it is needed for the
titration of 47 65 ml of 0 06320 M KMnO 4 solution
9 The reaction is
2MnO 4 - + 5C 2 Or + 16H+ -» 2Mn
2+ + 10CO 2 + 8H 2 O
13. How many millihters of a solution containing 31 52 g KMnO 4 per liter will
react with 3 814 g FeSO 4 7H 2 O
9 The reaction is
MnO 4 - + 5Fe
2+ + 8H+ -H» Mn
2+ + 5Fe
3+ + 4H 2 O
14 It takes 35 00 ml of 0 1500 M KOH to react with 40 00 ml of H 3 PO 4 solution
The titration reaction is
H 3 P0 4 + 20H -> HPOr + 2H 2 O
What is the molanty of the H 3 PO 4 solution
9
15 A 19 75 ml sample of vinegar of density 1 061 g/ml requires 43 24 ml of 0 3982
M NaOH for titration What is the percentage by weight of acetic acid,
HC 2 H 3 O 2 , in the vinegar
9
16 If we add 39 20 ml of 0 1333 M H 2 SO 4 to 0 4550 g of a sample of soda ash that
is 59 95% Na 2 CO 3 , what volume of 0 1053 M NaOH is required for backtitration
9
Stolchlometry III Calculations Based on Concentrations of Solutions
4 Give the weight of metal ion in each of the following solutions
(a) 250 ml of 0 10 M CuSO 4
(e) 75 ml of 0 10 M A1C1 3
(b) 125 ml of 0 050 M CdCl 2
(f) 1 5 liters of 3 0 M AgNOj
(c) 50 ml of 0 15 M MgSO 4
(g) 2 0 liters of 0 333 M Fe 2 (SO 4 ) 3
(d) 50 ml of 0 075 M Na 2 SO 4
5 The density of a 7 00 M HC1 solution is 1 113 g/ml Find the percentage of HC1
by weight
6 (a) What is the percentage of HNO 3 by weight in a 21 2 M solution of HNO 3
whose density is 1.483 g/ml
9
(b) What is the molahty of this solution
9
7 If 3 0 liters of 6 0 M HC1 are added to 2 0 liters of 1 5 M HC1, what is the
resulting concentration
9 Assume the final volume to be exactly 5 0 liters
8 What volume of 15 0 M HNO 3 should be added to 1250 ml of 2 00 M HNO 3 to
prepare 14 0 liters of 1 00 M HNO 3
9 Water is added to make the final volume
exactly 14 0 liters
9 The density of a 2 04 M Cd(NO 3 ) 2 solution is 1 382 g/ml If 500 ml of water is
added to 750 ml of this solution, (a) what will be the percentage by weight of
Cd(NO 3 ) 2 in the new solution
9 (b) What will be its molahty'
10 If 40 00 ml of an HC1 solution is titrated by 45 00 ml of 0 1500 M NaOH, what
is the molanty of the HC1
9
11 We need 35 45 ml of an NaOH solution to titrate a 2 0813 g sample of pure
benzoic acid, HC 7 H 5 O 2 What is the molanty of the NaOH solution'
12 What is the molanty of a K 2 C 2 O 4 solution if 35 00 ml of it is needed for the
titration of 47 65 ml of 0 06320 M KMnO 4 solution
9 The reaction is
2MnO 4 - + 5C 2 Or + 16H+ -» 2Mn
2+ + 10CO 2 + 8H 2 O
13. How many millihters of a solution containing 31 52 g KMnO 4 per liter will
react with 3 814 g FeSO 4 7H 2 O
9 The reaction is
MnO 4 - + 5Fe
2+ + 8H+ -H» Mn
2+ + 5Fe
3+ + 4H 2 O
14 It takes 35 00 ml of 0 1500 M KOH to react with 40 00 ml of H 3 PO 4 solution
The titration reaction is
H 3 P0 4 + 20H -> HPOr + 2H 2 O
What is the molanty of the H 3 PO 4 solution
9
15 A 19 75 ml sample of vinegar of density 1 061 g/ml requires 43 24 ml of 0 3982
M NaOH for titration What is the percentage by weight of acetic acid,
HC 2 H 3 O 2 , in the vinegar
9
16 If we add 39 20 ml of 0 1333 M H 2 SO 4 to 0 4550 g of a sample of soda ash that
is 59 95% Na 2 CO 3 , what volume of 0 1053 M NaOH is required for backtitration
9