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23 March, 19:18

Two samples of sodium chloride were decomposed into their constituent elements. one sample produced 6.98g of sodium and 10.7g of chlorine, and the other sample produced 11.2 g of sodium g and 17.3g of chlorine. are these results consistent with the law of definite proportion?

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  1. 23 March, 19:39
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    In law of definite proportions, all you need to show is how much one component reacts with another one on a unit weight basis. So let us try it here.

    Sample 1: 6.98 g Na reacts with 10.7 g Cl, so 1 g Na will react with 10.7/6.98 = 1.53 g Cl Sample 2: same approach as above, 17.3/11.2 = 1.54 g Cl

    So in both samples of NaCl, the sodium reacts with Cl in a definite proportion of 1:1.5 (rounded out).

    There you have it.

    p. s. you can do these calculations either on per g or per 100 g basis, ratios will remain the same.
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