2nd practice for Solutions, Acids and Bases

Front

What term describes the highest concentration of a substance that can be dissolved in a solvent at a specific temperature?

Back

Solubility

Front

In the data shown in the graph below, the solubility of WHICH salt does not increase as temperature increases? Options: NH₃, KI, NaCl, KNO₃

Back

KI

Front

Behavior of solubility with temperature changes based on the solubility chart.

Back

As temperature increases from 20°C to 80°C, the solubility of KNO₃ increases significantly.

Answer explanation

The correct choice states that as temperature increases from 20°C to 80°C, the solubility of KNO₃ increases significantly, which is supported by solubility charts showing that many salts, including KNO₃, become more soluble with higher temperatures.

Front

In which solution is it easiest to dissolve additional sugar? Options: saturated, supersaturated, suspended, unsaturated.

Back

unsaturated

Front

Which statement about electrolytes is incorrect?

Back

They can be found in solid form.

Answer explanation

The statement "They can be found in solid form" is incorrect because while many electrolytes are solids, they must dissolve in solution to dissociate into ions and conduct electricity, which is their defining characteristic.

Front

Maya accidentally put too many scoops of coffee in the coffee maker. What type of coffee solution did she make and how could she fix the mistake without throwing the coffee away?

Back

Concentrated coffee solution; fix by adding water.

Front

If you are making Gatorade by mixing the powder with water, which substance is the solute?

Back

Gatorade mix powder

Answer explanation

The Gatorade mix powder is the solute because it is the solid substance being dissolved in water, which acts as the solvent. The resulting mixture is a solution of Gatorade.

Front

Classify a NaCl solution with 40 g of solute in 100 g of water at 80°C in terms of saturation.

Back

unsaturated

Answer explanation

At 80°C, the solubility of NaCl is about 39 g per 100 g of water. Since the solution contains 40 g of NaCl, it exceeds the solubility limit, indicating it is unsaturated.

Front

Which is NOT true of the solubility curve below?

Back

KNO₃ is least affected by a temperature increase.

Answer explanation

KNO₃ is actually highly affected by temperature changes, showing significant increases in solubility with rising temperatures. Therefore, the statement that KNO₃ is least affected by a temperature increase is NOT true.

Front

Which properties of a saltwater solution allow additional salt to dissolve the quickest?

Back

high temperature and low salt concentration