Problems A
325
With Np
3+ showing a change in electrical charge of 3 on oxidation by KMnO 4 ,
its new charge must be +6
PROBLEMS A
1 Tell how you would prepare each of the following solutions
(a) 250 ml of 0 100 N sulfamic acid from solid H(NH 2 )SO 3
(b) 500 ml of 0 200 N Ba(OH) 2 from solid Ba(OH) 2 8H,O
(c) 750 ml of 2 50 N A1(NO 3 ) 3 from solid A1(NO,) 3 9H 2 O
2 Tell how you would prepare each of the following solutions
(a) 2 00 liters of 0 0600 N Ba(OH) 2 from 1 86 M Ba(OH) 2
(b) 75 0 ml of 0 300 N A1C1 3 from 4 30 M A1C1 3
(c) 150 ml of 0 0320 M CdSO 4 from 0 100 N CdSO 4
3 What volume of 6 00 M H 2 SO 4 should be added to 10 0 liters of 2 00 N H 2 SO 4
in order to get 20 0 liters of 3 00 M H 2 SO 4 on dilution with water
9
4 How much of each of the following substances is needed to react completely
with 40 00 ml of 0 1000 N H 2 S(V
(a) ml of 0 1500 N KOH
(d) mg of Zn
(b) mg of KOH
(e) ml of 0 6500 M Pb(NO 3 ) 2
(c) mg of A1 2 O 3
(f) ml of 0 05000 M Na 2 CO 3
5 How many ml of 0 1506 N Ba(OH) 2 are needed for the titration of 40 00 ml of
0 1000 M H 2 S(V
6 The NH 3 liberated from a 0 4234 g sample of impure NH 4 C1 by the addition of
excess concentrated NaOH is collected in 25 00 ml of 0 1527 M H 2 SO 4 After
removal and rinsing of the delivery tube, the excess H 2 SO 4 requires 4 65 ml of
0 1103 M NaOH for titration Calculate the percentage of NH 4 C1 in the original sample
7 What is the molanty of a Na 2 SO, solution if 30 00 ml of it require 45 00 ml of
0 04120 M KMnO 4 for titration
9
8 (a) What is the normality of a cenc sulfete solution if 46 35 ml are required to
titrate a 0 2351 g sample of Na 2 C 2 O 4 that is 99 60% pure
9
(b) What is the molanty of the solution
1
9 A 0 2586 g sample of H 2 C 2 O 4 2H 2 O requires 28 23 ml of KOH for titration,
whereas a 0 1875 g sample requires 35 08 ml of KMnO 4 for titration Calculate
the moJanty and normality of each of these solutions
10 A 0 32)6 g sample of 99 70% pure iron wire is dissolved in acid and converted
to the Fe
2+ state, and then immediately titrated with 3671 ml of K 2 Cr 2 O 7
solution What is the normality of the K 2 Cr 2 O 7 solution
1
11 A 0 5000 g sample of KHC 8 H 4 O 4 requires 41 66 ml of a Ba(OH) 2 solution for
titration A 27 64 ml sample of this same solution requires 25 06 ml of an
HNO 3 solution for titration Calculate the molanty of the Ba(OH) 2 and HNO 3
solutions
325
With Np
3+ showing a change in electrical charge of 3 on oxidation by KMnO 4 ,
its new charge must be +6
PROBLEMS A
1 Tell how you would prepare each of the following solutions
(a) 250 ml of 0 100 N sulfamic acid from solid H(NH 2 )SO 3
(b) 500 ml of 0 200 N Ba(OH) 2 from solid Ba(OH) 2 8H,O
(c) 750 ml of 2 50 N A1(NO 3 ) 3 from solid A1(NO,) 3 9H 2 O
2 Tell how you would prepare each of the following solutions
(a) 2 00 liters of 0 0600 N Ba(OH) 2 from 1 86 M Ba(OH) 2
(b) 75 0 ml of 0 300 N A1C1 3 from 4 30 M A1C1 3
(c) 150 ml of 0 0320 M CdSO 4 from 0 100 N CdSO 4
3 What volume of 6 00 M H 2 SO 4 should be added to 10 0 liters of 2 00 N H 2 SO 4
in order to get 20 0 liters of 3 00 M H 2 SO 4 on dilution with water
9
4 How much of each of the following substances is needed to react completely
with 40 00 ml of 0 1000 N H 2 S(V
(a) ml of 0 1500 N KOH
(d) mg of Zn
(b) mg of KOH
(e) ml of 0 6500 M Pb(NO 3 ) 2
(c) mg of A1 2 O 3
(f) ml of 0 05000 M Na 2 CO 3
5 How many ml of 0 1506 N Ba(OH) 2 are needed for the titration of 40 00 ml of
0 1000 M H 2 S(V
6 The NH 3 liberated from a 0 4234 g sample of impure NH 4 C1 by the addition of
excess concentrated NaOH is collected in 25 00 ml of 0 1527 M H 2 SO 4 After
removal and rinsing of the delivery tube, the excess H 2 SO 4 requires 4 65 ml of
0 1103 M NaOH for titration Calculate the percentage of NH 4 C1 in the original sample
7 What is the molanty of a Na 2 SO, solution if 30 00 ml of it require 45 00 ml of
0 04120 M KMnO 4 for titration
9
8 (a) What is the normality of a cenc sulfete solution if 46 35 ml are required to
titrate a 0 2351 g sample of Na 2 C 2 O 4 that is 99 60% pure
9
(b) What is the molanty of the solution
1
9 A 0 2586 g sample of H 2 C 2 O 4 2H 2 O requires 28 23 ml of KOH for titration,
whereas a 0 1875 g sample requires 35 08 ml of KMnO 4 for titration Calculate
the moJanty and normality of each of these solutions
10 A 0 32)6 g sample of 99 70% pure iron wire is dissolved in acid and converted
to the Fe
2+ state, and then immediately titrated with 3671 ml of K 2 Cr 2 O 7
solution What is the normality of the K 2 Cr 2 O 7 solution
1
11 A 0 5000 g sample of KHC 8 H 4 O 4 requires 41 66 ml of a Ba(OH) 2 solution for
titration A 27 64 ml sample of this same solution requires 25 06 ml of an
HNO 3 solution for titration Calculate the molanty of the Ba(OH) 2 and HNO 3
solutions