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Consider the following reactions : (i) Dilute hydrochloric acid reacts with sodium hydroxide. (ii) Magnesium oxide reacts with dilute hydrochloric acid. (iii) Carbon dioxide reacts with sodium hydroxide. It is found that in each case :
What is the pH of a neutral solution at 25°C, and what does this indicate about the concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻)?
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