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9 July, 01:34

1. An acid is a substance that has a pH value that is lower than 7. A base is a substance that has a pH that is greater than 7. Citric acid commonly present in sour foods. Which one of these might be the pH of a citric acid solution?

pH=3.2

pH=7.0

pH=10.3

pH=14.0

2. Which mixture is homogenous?

Salt stirred together with sugar

Sugar dissolved in water

water droplets scattered in the air to form fog

dirt suspended in water

3. Which mixture is heterogeneous

salt dissolved in water

air

metal ally

tossed salad

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Answers (1)
  1. 9 July, 02:17
    0
    1. pH=3.2

    2. Sugar dissolved in water

    3. Tossed Salad
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