What is the use of calcium hydroxide, Ca(OH)2, in agriculture?
Ca(OH)2 is used to treat acidic soil and adjust pH levels for optimal plant growth.
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What is the use of magnesium hydroxide, Mg(OH)2, in medicine?
Mg(OH)2, known as milk of magnesia, is used to neutralise excess stomach acid and alleviate symptoms of heartburn and indigestion.
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What is the ionic equation for the reaction of a group 2 metal oxide (MO) with water?
MO + H2O ➔ M2+ + 2OH-
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State and explain the trend in alkalinity of the solutions formed when group 2 oxides react with water.
The solutions become more alkaline as we move down group 2.
This is because the solubility of the group 2 hydroxides in water increases down the group, so the resulting solutions contain a higher concentration of OH-(aq) ions.
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