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Introduction to Chemistry

what is the f...

Question

what is the formula for =magnesium oxide+water=magnesium hydroxide?

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Solution

The chemical formula of magnesium oxide is MgO, that of water is H₂O and magnesium hydroxide is Mg(OH)₂. Thus, the chemical equation for the given chemical reaction is as follows
MgO + H₂O â†’ Mg(OH)₂

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Q. When water is added to magnesium oxide ,magnesium hydroxide is produced which is also present in lime water .So, is it correct that the magnesium hydroxide present in lime water and the magnesium hydroxide formed from magnesium oxide and water are one and the same?

Q. Write down the formulae for the following compounds :
(a) Calcium oxide
(b) Magnesium hydroxide

Write down the formulae of

(i) sodium oxide

(ii) aluminium chloride

(iii) sodium sulphide

(iv) magnesium hydroxide

Q. Which among the following statements is incorrect for magnesium metal?

(a) It burns in oxygen with a dazzling white flame.
(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

Q. Write the chemical formula of magnesium hydroxide.

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