Introduction to Reading Solubility Curves

At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K₂Cr₂O₇?

• 60 ºC
• 30 ºC
• 50 ºC
• 83 ºC

Tags

NGSS.HS-PS3-4

How many grams of K₂Cr₂O₇, are soluble in 100 g of water at 95 ºC?

• 83 grams
• 75 grams
• 40 grams
• 12 grams

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Which substance is MOST soluble at 0 ºC?

• KI
• NaNO₃
• NaCl
• Ce₂(SO₄)₃

Which solute is the most soluble at 10 ⁰C?

• KI
• KClO₃
• NH₄Cl
• NH₃

Which of these solutes does not increase in solubility as temperature rises?

• NH₃
• NaNO₃
• KNO₃
• NaCl

Tags

NGSS.HS-PS3-4

Which solute is the least soluble at 90 ⁰C?

• SO₂
• KClO₃
• KI
• HCl

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

When 20 grams of potassium chlorate, KClO₃, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated
• saturated
• unsaturated

When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated
• unsaturated
• saturated

When 42 grams of potassium chloride, is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated
• saturated
• unsaturated

Rate of dissolving can be increased by:

• Agitation or mixing the substance.
• Increasing temperature.
• Increasing surface area.
• All of the above.

Tags

NGSS.HS-PS1-5