Solubility Curves Questions

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Solubility Curves Questions
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1. What is the maximum amount of K2CrO4 that can
be dissolved in 100g of water of 80C?

• approximately 70-72 grams

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2. What compound(s) appear to decrease in
solubility as the temperature increases?

• Li2SO4

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3. What is the effect of an increase in
temperature in the solubility of NaCl?

• Very little effect, approximately 4-5 grams over
  80C of temperature.

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4. If you had a solution that contained 120g of
NaClO3 dissolved in 100g of water at 60C, would
it be saturated, unsaturated or supersaturated?

• It would be unsaturated since 120 grams falls
  below the solubility curve.

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5. What temperature must 100g of water be at to
completely dissolve 70g of Pb(NO3)2?

• Approximately 40C

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6. If you had a solution that contained 80g of
KNO3 at 48C, would it be saturated, unsaturated
or supersaturated?

• Saturated since it falls on the line or very
  close to it.

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7. Which has the higher solubility, K2CrO4 at
30C or NH4Cl at 75C?

• K2CrO4 64g
• NH4Cl 62g

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8. If you had a 100g solution of water at 80C
that contained 30g of Ba(NO3)2, would it be
saturated, unsaturated or supersaturated?

• VERY CLOSE above the line supersaturated, on
  the line saturated

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What is the maximum mass of KNO3 that can
dissolve in 100g of water at 55C?

• 90 grams