Question

A student detected the pH of four unknown solutions A, B, C and D as follows 11, 5, 7 and 2. Predict the nature of each of the solutions.
(c) Arrange the above four solutions in the increasing order of H+ ion concentration.
(d) State the change in colour of litmus papers when dipped into solutions C and D.

Answer 1

Answer:

• The nature of these solutions are:

A -basic

B -acidic

C -neutral

D -very acidic

• increasing order of H+ ion concentration:

A<C<B<D

• The change in colour of litmus paper when dipped into the solutions of -

C = green

D = blue to red

Answer 2

Answer:

GHDFHSHSFHJ

Explanation: