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Question
A solution has pH=7 at room temperature. At 1000C, the same solution will be:
A solution has pH=7 at room temperature. At 1000C, the same solution will be:
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Solution
The correct option is B Basic
At room temperature (i.e. 25oC), at a pH of 7, water is neutral. Since the dissociation of water is an endothermic process, as the temperature increases, the concentration of H+ ions and OH− increases and hence, the pH and pOH of water both decrease by the same amount. Since the concentrations of both the ions is still the same, the solution is still neutral. The only difference is that the value of pH at this higher temperature would be lower than 7 – which would be the same as the value of pOH.
At room temperature (i.e. 25oC), at a pH of 7, water is neutral. Since the dissociation of water is an endothermic process, as the temperature increases, the concentration of H+ ions and OH− increases and hence, the pH and pOH of water both decrease by the same amount. Since the concentrations of both the ions is still the same, the solution is still neutral. The only difference is that the value of pH at this higher temperature would be lower than 7 – which would be the same as the value of pOH.
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