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1. To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogenions
3.Litmus solution is obtained from lichens. A natural dye extracted from lichens is dissolved in distilled water to obtain a litmus solution. It is used as an indicator to distinguish between acids and bases.
5.When we cut wood only its shape and size is changed and no new substance is formed. But, when we burn wood, a new substance is formed.
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