10 ml solution of nacl and kcl on evaporation give 0.93g of mix salt which gives 1.85g og AgCl by reacting with AgNO3 solution.Calculate the weight of nacl in the sample.
 

Asked by Harshit Agarwal | 24th Aug, 2014, 11:50: AM

Expert Answer:

Given:

Mass of NaCl + Mass of KCl = 0.93 g

Let, x = grams of NaCl in original 10 ml solution mixture. Therefore, (0.93 - x) = grams of KCl in original mixture will be,

 (x) + (0.93 - x) = 0.93 g

 

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So, the total mass of AgCl produced will be,

2.45 x + 1.92(0.93 - x) = 1.865

2.45 x + 1.785 - 1.92x = 1.865

0.53 x = 0.08

or, x = 0.150 g

Therefore, mass of NaCl = 0.15g

and mass of KCl = 0.93-x =0.93-0.15 = 0.78 g

Therefore, quantity of NaCl = 0.15 g

 

Answered by Hanisha Vyas | 25th Aug, 2014, 11:52: AM