Question

13. (a) State the law of constant proportion.
(b)2 g of hydrogen combine with 16 g of oxygen to form water. How many grams of water
will be formed?
(c) What is an ion? Name the two types of ions.
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Answer 1

(a)

The law of constant proportions states that a given chemical compound always contains its component elements in fixed ratio.

(b)

3 grams of water will be formed- 2g of H and 1g of O. 15 gms of oxygen would be left out.

(c)

An ion is formed when an element loses or gains an electron.

Ions are of 2 types:

1. Anions, ie, - ve ions
2. Cations, ie, + ve ions