A) 7.2
B) 14.0
C) 6.8
D) 6.0
Correct Answer: C
Solution :
With the rise in temperature, the ionic-product of water increases, hence\[p{{K}_{\omega }}\] decreases\[\left( p{{K}_{\omega }}=\log \frac{1}{{{K}_{\omega }}} \right)\]. We know that, \[pH+pOH=p{{K}_{w}}\] Hence, pH of solution also decreases with increase in temperature. Hence, at body temperature \[\left( 38{}^\circ C \right)\] the pH of neutral solution will be approximately 6.8.
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