Question

please help me with 15.35 and 15.38 and 15.57

thank you

$ $ $ i a solution 15.34 Det : $ --.5 X 10M use of the - 15.6 and е ion a Solution in which (OH 1 = 8.33 X 10M Determine the hydrogen ion or hydroxide ion concentra- tion in each of the following solutions, as appropriate. (a) a solution in which [ H 0 *) = 9.02 X 10 M b) a solution in which (OH) = 1.06 X 10-11 M The concentration of hydrogen ions in human blood is pproximately 4,0 x 10-8 M. What is the hydroxide ion concentration in blood? 15.36 The hydroxide ion concentrations in wines actually range from 7.4 x 10-12 M to 1.6 X 10-10 M. What is the range of hydrogen ion concentrations in wine? OBJECTIVE Convert between hydrogen ion concentra- tions, hydroxide ion concentrations, pH, and pOH. ase of the 15.6 and Co, cid of the 15.6 and 15.37 Fill in the following table, and indicate whether the solu- tion is acidic, basic, or neutral. onjugate pH (HO), M . 2.34 1.04 x 10-13 1.09 onjugate 22 OSOBES 2.12 x 10-11 7.40 X 10-2 13.41 7.07 x 10-5 9.80 sted- 0.505 1. Predict eir conju- acid- (15.38 Fill in the following table, and indicate whether the solu- tion is acidic, basic, or neutral. [H3O*, M pH 2.00 1.04 x 10- escaces 2.00 X 10-1 9.40 X 10-? redict ir conju- acid- 4.57 X 10 - 6.65 x 10-15 15.39 Fill in the following table, and indicate whether the solu- tion is acidic, basic, or neutral. .. ou OH-LM rid-

Answer 1

Solution:

15.35) The hydrogen ion concentration (H+) = 4.0 x 10^-8 M

Since,

[H+ ] [OH-] = 1 x 10^-14

Hence,

[OH-] = 1 x 10^-14 / 4 x 10^-8

[OH-] = 2.5 x 10^-7 M

15.38)

A) pH = 2.34

[H3O+] = 10^-pH = 10^-2.34 = 4.6 x 10^-3 M

Acidic

B) [H3O+] = 1.04 x 10^-3

pH = - log [H3O+] = - log 1.04 x 10^-3 = 3 -0.02 = 2.98

Acidic

C) pH = -0.19

[H3O+] = 10^- (-0.1) = 10^0.1 = 1.26 M

Acidic

D) [H3O+] = 2 x 10^-1 = 0.2 M

pH = - log [H3O+]

pH = - log 0.2 = 0.70

Acidic