The measured pH values of incoming and outgoing water at a water treatment plant are 7·3 and 8·5 respectively. What is the average pH of water, assuming a linear variation of pH with time?
1
6·55
2
7·57
3
8·12
4
9·23
The measured pH values of incoming and outgoing water at a water treatment plant are 7·3 and 8·5 respectively. What is the average pH of water, assuming a linear variation of pH with time?