Question

Ph of an aqueous kcl solution at 40°c should be?
a) 7 b) >7
c)<7 d) 0

Answer 1

$\mathcal{\underline{ANSWER}}$

OPTION A

pH of KCl solution at 40°C would be exactly 7 .

⚫ Potassium chloride solution would have potassium and chloride ions in it .

⚫ We know that potassium is an ion which is present in a strong base : potassium hydroxide .

⚫ We also know that the chloride ion is present in a strong acid : hydrochloric acid .

⚫ We know that pH is the negative logarithm to the concentration of the hydrogen concentration .

⚫ Since water has a pH of 7 , and potassium and chloride does not affect the hydrogen concentration , then the pH of the solution has to be 7 .

⚫ At 40° C ,  the pH of water may however be less than 7 because as temperature increases , pH of water decreases .

Answer 2

Friend the answer will be 7(b) because it cannot loss or gain any hydrogen .so nO effect on ph..