Question

You have four solutions A, B, C and D. The pH of solution A is 6, B is 9, C is 12 and D is 7
(i) Identify the most acidic and the most basic solutions.
zine metal
(ii) Arrange the four solutions in the increasing order of H+ ion concentration.
(iii) State the change in colour of ph paper on dipping in solution C and D.
​

Answer 1

Answer:

i] A is the most acidic and C is the most basic

ii] increasing order of h+ ions is

C, B, D, A

iii] by dipping ph paper in solution C, it turns blue { because ph is 12 'basic }

  by dipping ph paper in solution D, it turns green { because ph is 7 'neutral' }

Answer 2

Answer:

ph of a=2

b=9

c=12

d=7

1. most acidic - a : basic -c
3. $c < b < d < a$
4. $c = turn blue$

d= neutral