Question

Explain some uses of calcium and strontium.

★ Only quality answers needed.
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Answer 1

Answer:

calcium

Calcium is a silvery-white, soft metal that tarnishes rapidly in air and reacts with water. Calcium metal is used as a reducing agent in preparing other metals such as thorium and uranium. It is also used as an alloying agent for aluminium, beryllium, copper, lead and magnesium alloys.

strontium

A soft, silvery metal that burns in air and reacts with water. Strontium is best known for the brilliant reds its salts give to fireworks and flares. It is also used in producing ferrite magnets and refining zinc. Modern 'glow-in-the-dark' paints and plastics contain strontium aluminate.

Answer 2

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Uses of calcium

★ As a reducing agent in the metallurgy of uranium, zirconium and thorium.

★ As a deoxidiser, desulphuriser or decarboniser for various ferrous and non-ferrous alloys.

★ In making cement and mortar to be used in construction.

★ As a getter in vacuum tubes.

★ In dehydrating oils

★ In fertilisers, concrete and plaster of paris.

Uses of strontium:

★ ^90Sr is used in cancr therapy.

★ ^87Sr/^86Sr ratios are commonly used in marine investigations as well as in teeth, tracking animal migrations or in criminal forensics.

★ Dating of rocks

★ As a radioactive tracer in determining the source of ancient archaeological materials sich as timbers and coins.