1) If a sample in the experiment contained a volatile impurity, what VALUE would

Question

1) If a sample in the experiment contained a volatile impurity, what VALUE would be in ERROR? The MASS of the ANHYDROUS SALT or the MASS of the water? And please EXPLAIN WHY.

2) You prepared a solution of coolant for your car's radiator by mixing antifreeze, ethylene glycol and water. How MANY PHASES would you SEE in the resulting mixture? If you sampled the top of the solution and the bottom of the solution, would you find differences between the properties of the samples? EXPLAIN your ANSWER.

3) About 88g of sodium nitrate (NaNO3) dissolves in 100g of water at 20degC. Is this solution SATURATED or UNSATURATED? WHAT would happen if you ADDED 10 more grams of sodium nitrate (NaNO3) to the solution? After you added 10g, WHAT would you SEE if you RAISED the temperature to 40degC?

4) Give an example of a strong electrolyte. What property would make it a strong electrolyte?

THANK YOU!

Explanation / Answer

1.the mass of the water would be in error.
thus,
mass of water = mass of hydrate sample - mass of anhydrous salt
If the sample contains a volatile, the mass of hydrate sample will be affected, nut the mass of anhydrous salt will not be affected. As a result, the mass of water will be affected.

4.An electrolyte is a substance that dissociates completely in water: strong acids, strong bases and ionic compounds are strong electrolytes.

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