PL HELP What are two examples of acids and two examples of bases that may be found in your kitchen? Describe two physical or chemical properties of each acid or base that helped you identify them.

Neutral substance is a substance that shows no acid or base properties, has an equal number of hydrogen and hydroxyl ions and does not change the colour of litmus-paper. Water, sugar and table salt are common examples of neutral substances.

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c- cold periods in earth's history during which glaciers covered much of the surface.

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