Acid and base are mixed to give salt and water. This process is exothermic in nature giving out heat called heat of neutralization which causes an increase in temperature.
So, these reactions can be explosive in nature when acid is added to any base and this raises the temperature of acid-base reactions.
HCl+NaOH→NaCl+H
"pH" is the negative of the logarithm of the hydrogen ion concentration, according to the simple Arrhenius definition of acids and bases. As a result, as the concentration of acid (hydrogen ions) increases, so does the pH value.
"Equal" acid-base ratios in solution require a more precise description. Varied concentrations in pure volumetric ratios can have extremely different equilibrium pH values.
If we interpret it as the common "equivalence point" where the acid and base components "neutralize," the resulting pH is in the "middle" - pH 7.0 - only when the acid and base are of equal relative strength in terms of dissociation, not concentration.
A strong base weak acid will have an equivalency point that is somewhat higher in pH than a weak base, strong acid.
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