HCl is a strong electrolyte. A bottle of HCl contains the label 0.015 M HCl(aq).

Question

HCl is a strong electrolyte. A bottle of HCl contains the label 0.015 M HCl(aq). Which statement concerning this HCl solution is FALSE? The solution is acidic. The pH of the solution is 1.5. The hydronium ion concentration in this solution is 0.015 M. The solution has a higher concentration of hydronium ions than hydroxide ions. The solution contains dissolved H3O* and Cl ions only: no HCl molecules are present. If the hydronium ion concentration of an aqueous solution at 25 degree C is 5.2 x 10 4 M. what is the hydroxide ion concentration? 1.9 times 10^-11 M 1.0 times 10^7 M 1.0 times 10^4 M zero 5.2 times 10^4 M When n solution has pH = 5.30, the [H_3O^+] is 5.0 times 10^-6 M 2.0 times 10^-9 M 0.72 M 13.27 M 5.30 times 10^-3 M

Explanation / Answer

15.

[H+] = 0.015

pH = -log(0.015) = 1.8239

A)

is true, since pH is below 7

b)

pH is 1.82, so this is false

c)

Correct, since HCl + H2O <--> H3O+ + Cl-

hydronium ion concnetration = HCl concentration

d)

[H3O+][OH-] = 10^-14 always true

if [H3O+] = 0.015 then [OH-] must be lower

e)

This is true since HCl will dissocaite 100% since it is strong acid

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