Question

a) What pH do you expect for the following salt solutions and why?
NaCl, CuSO4 , and Na2CO3
b) Alcohol and glucose also contain hydrogen but do not conduct electricity. Why?​

Answer 1

NaCl is neutral so 7
CuSO4 is <7
Na2CO3 is 11
2. Because when they dissolve in water they do not release hydrogen ions. ... ... and in case of alcohol and glucose no free ions are there, so only presence of H is not sufficient but presence of H⁺ i.e. free ion is sufficient to conduct electricity.

Answer 2

Answer:-

(a)

NaCl is a salt of strong acid (HCl) and a strong base (NaOH). Therefore, its solution is neutral with

pH = 7

CuSO4 is a salt of strong acid (H2SO4) and weak base [CU(OH)2]. Therefore, its solution is acidic with pH < 7.

Na2CO3 is a salt of strong base (NaOH) and weak acid (H2CO3). Therefore, its solution is basic with pH > 7.

(b)

As glucose and Alcohol are not ionic compounds, they are covalent bcoz electrons are shared rather transferred between two atoms.

And for conduction of electricity, solution must have free ions present, and in case of alcohol and glucose no free ions are there, so only presence of H is not sufficient but presence of H⁺ i.e. free ion is sufficient to conduct electricity.