- Explain the meaning of the following terms:
a. Acid – an acid is defined as a substance that gives hydrogen ion (H + -) or a hydronium ion
(H 3 O + -) when dissolved in water.
b. Base – A base is defined as a substance that gives hydroxide ion (OH – -) when dissolved in
water. Bases accepts protons
c. Indicator – – could be a weak acid or a weak base that exhibits a color change as the concentration of hydrogen or hydroxide ions changes in a solution
d. Natural indicator – it is a naturally occurring substance that can be used to determine PH of
another substance
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