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Question

Write the following in the form of a word equation:
Sodium hydroxide reacts with calcium bromide to form calcium hydroxide and sodium bromide.In the formula CaBr2​ what does Ca stand for and what is its valency?

A
Sodium hydroxide + calcium bromide = Calcium hydroxide + sodium bromide; calcium; 1
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B
Sodium hydroxide + calcium bromide Calcium hydroxide + sodium bromide; calcium; 2
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C
Sodium hydroxide + calcium bromide Calcium hydroxide + sodium bromide; calcium; 3
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D
Sodium hydroxide + calcium bromide Calcium hydroxide + sodium bromide; potassium; 2
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Solution

The correct option is B Sodium hydroxide + calcium bromide Calcium hydroxide + sodium bromide; calcium; 2
The word equation will be be written as:
Sodium hydroxide + calcium bromide Calcium hydroxide + sodium bromide.
Ca stands for calcium. From the formula CaBr2 it is evident that the valency of calcium is 2 and the valency of bromine is 1.

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