Student | ||||
A | 7 | 1 | 1 | 1 |
B | 7 | 3 | 1 | 1 |
C | 7 | 1 | 1 | 13 |
D | 7 | 3 | 1 | 13 |
Answer:
(a) The result of student D. It is
because, water is neutral having pH = 7
is a weak
acid having pH = 3
HCl is a strong acid having pH =
1
NaOH is strong base having pH
=13 (1)
(b) In bottle A colour of pH
paper is orange due to the presence of acid (vinegar).
In bottle B colour of pH paper
is blue due to the presence of base (sodium carbonate solution).
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