Milk (pH 6.7) is slightly acidic because it contains ____.
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calcium
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Sodium ____ is added to toothpaste to harden tooth enamel.
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carbonic acid
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The electrolyte in a car battery is ____.
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fluoride
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Mixing HCl and NaOH produces ____ (table salt) and water.
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lactic acid
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Typically, ____ (pH 2.5) contains 5% acetic acid by volume.
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NaCl
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The fizz in soft drinks is produced by adding ____.
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rust
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Iron can oxidize to iron oxide, which is also known as ____.
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sulfuric acid
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Hard water contains ____ and magnesium ions.
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vinegar
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