EXPERIMENT 2 Questions Name Section Questions solid didn\'t appear to dissol ve

Question

EXPERIMENT 2 Questions Name Section Questions solid didn't appear to dissol ve at all in a liquid. How is it possible to determine whether or not a small amount did dissolve? 2. Solubility is sometimes quantified as grams of substance that dissol could the solubility be determined using these units? ves per 100 g solvent. How 3· Suppose you had a highly volatile liquid sample. Such a sample would evaporate easily. could be a source of error in the density determination, and how could it be minimized? What 4. If a solid sample melted over a long range, what would this indicate? Denver is known as the "mile-high city: its altitude is 5280 ft. Is the normal atmospheric pressure in Denver 760 torr, or is it normally higher or lower? Would a liquid boil at its usual boiling point in Denver, or would boil at a higher or lower temperature than its normal boiling point? Explain. 6. Classify as either a chemical property or chemical change or physical property or physical change: a) the reddish-orange color of iron oxide (rust) b) gasoline evaporating e) liquid antimony cooling to form solid antimony 19

Explanation / Answer

Just heat the solid substance, because solubility increase as the temperature rises.

Solubility is the amount substance dissolved in unit volume(1L) the solvent. If the solvent is solid it will be its mass. Then amount of substance in g/ mass of solvent (100g)

Density = mass/ volume

if the substance is evaporates, you cannot determine the exact mass and the exact volume. So the liquid should be placed in a closed container or minimize the chances for diffusion of gas by adjusting the physical parameters

its bolling point is very high, otherwise it will start bolling.

760 torr equal to 1 atm pressure. Water will boil at 100 0c . but as the altitude increases pressure will decrease, so pressure will not be 760 torr,will be less than that of it. Also the boiling point will start lowering. Boiling will occur at lesser boiling point than usual ones.

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