Time/h | pH |
0.0 | 7.0 |
01.0 | 7.0 |
02.0 | 7.1 |
03.0 | 7.2 |
0.40 | 4.1 |
Answer:
(a)
The three constituents of plaque other than food are acid, saliva and
bacteria. (1)
(b) Time 4.0, lowest pH indicate the highest amount of acid produced by
the bacteria. (1)
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