Question

In: Chemistry

Write the reaction of the following weak base with water. (1 point each) A. methyamine ...

Write the reaction of the following weak base with water. (1 point each)

A. methyamine

B. pyridine

2. What is the pH of 0.055 M aniline? Construct and use an ICE table. Use appropriate assumption. Check assumptions and if an assumption is false redo the problem without the false assumption. (3 points)-

Expert Solution

A. CH3NH2 + H2O(l) -------------------> CH3NH3^+ (aq) + OH^- (aq)

B. C5H5N + H2O(l) ------------------> C5H5NH^+ (aq) + OH^- (aq)

2. C6H5NH2 + H2O --------------> C6H5NH3^+ (aq) + OH^- (aq)

I 0.055 0 0

C -x +x +x

E 0.055-x +x +x

Kb = [C6H5NH3^+][OH^-]/ [C6H5NH2]

4.3*10^-10 = x*x/0.055-x

4.3*10^-10*(0.055-x) = x^2

x = 4.86*10^-6

[OH^-] = x = 4.86*10^-6M

POH = -log[OH^-]

= -log4.86*10^-6

= 5.3133

PH = 14-POH

= 14-5.3133 = 8.6867 >>>>answer

queen_honey_blossom answered 2 years ago

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