d) Give two properties each of acids and bases.
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Bases turn red litmus paper blue. Acids give off H+ (Hydrogen) ions in water; bases give off OH- (Hydroxide) ions in water. Acids generally taste sour due to the sour H+ ion; bases taste bitter due to the OH- ion; but they may have other tastes depending on the other part of the molecule.
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Acids =sour (vinegar) , sticky, frequently burns nose
Bases=bitter( baking soda) , slippery, usually have no smell (except NH3)
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