3 years ago

Which of the following is an endothermic reaction?

Chemistry

1 answer:

Black_prince [1.1K]3 years ago

7 0

Dissolving table NaCl into water is an endothermic reaction

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What is the correct answer?

densk [106]

Answer:

I think the answer is (a)-repeat the experiment using a larger sample size

I hope I can answer your question!

8 0

3 years ago

You are given a 1.50 g mixture of sodium nitrate and sodium chloride. you dissolve this mixture into 100. ml of water and then a

Elanso [62]

When AgNO₃ solution is added to mixture of NaNO₃ and NaCl, it reacts with NaCl and gives precipitate of AgCl, which is white solid. The reaction takes place in 1:1 stoicheometric ratio as per the following balanced reaction:

NaCl + AgNO₃→ AgCl ↓ + NaNO₃. As per reaction 1 mole NaCl reacts with 1 mole AgNO₃ and gives of solid precipitate of 1 mole AgCl.

0.641 g= $\frac{0.641}{143.32}$ = 4.47 X $10^{-3}$ mole of solid AgCl is produced. This indicates 4.47 X $10^{-3}$ mole NaCl = $4.47 X 10^{-3}X58.5$ g of Nacl reacts to give 0.641 g of AgCl. So, mass percentage of NaCl present in mixture= $\frac{0.26}{1.5} X 100$ = 17.33 %.