Weak acids and bases

Aqueous ammonia solution is generally used as a cleaning agent. (N:14, H:1) An ordinary solution of ammonia has a ph value of 10.

a) What is the molecular weight of ammonia

• 12

• 15

• 24

• 30

• 35

Aqueous ammonia solution is generally used as a cleaning agent. (N:14, H:1) An ordinary solution of ammonia has a ph value of 10.

b) What is the OH- ion concentration in this solution.

• 10^-10

• 10¹⁰

• 10⁴

• 10^-4

• 10^-7

Aqueous ammonia solution is generally used as a cleaning agent. (N:14, H:1) An ordinary solution of ammonia has a ph value of 10.

c) What is the concentration of ammonia solution, if 5 % of ammonia dissociate in its aqueous solution?

• 10^-5

• 2x10^-5

• 2x10^-3

• 10^-3

• 5x10^-4

Aqueous ammonia solution is generally used as a cleaning agent. (N:14, H:1) An ordinary solution of ammonia has a ph value of 10.

d) What is the base dissociation constant of ammonia?

• 2x10^-4

• 5x10^-6

• 2x10^-5

• 10^-4

• 10^-5

Aqueous ammonia solution is generally used as a cleaning agent. (N:14, H:1) An ordinary solution of ammonia has a ph value of 10.

e) How many mL of ammonia gas must be dissolved in 2 L water in order to obtain this solution at STP?

• 224

• 448

• 44,8

• 89,6

• 896