Concentration and Solubility

How much sodium chlorate will you have to add to 100 g of water at 50°C to make a saturated solution?

• 80 grams

• 157 grams

• 200 grams

• 123 grams

Using the graph above, at which temperature can you make a saturated solution of 81 grams of potassium bromide in 100 grams of water?

• 35℃

• 60℃

• 90℃

• 80℃

According to the graph above, which of the four compounds has the greatest solubility at 85℃?

• KNO3

• KBr

• NaCl

• NaClO3

According to the graph above, which solute can you dissolve 38g in 100g of water at a temperature of 80℃ to make a new saturated solution?

• KNO3

• KBr

• NaCl

• NaClO3

Tags

NGSS.MS-PS1-2

Potassium bromide is dissolved in water. What substance is the solvent?

• KBr

• H₂O

• KNO₃

• NaClO₃

As the concentration increases …

• The amount of solute that is dissolved decreases.

• The amount of solute that is dissolved increases.

• The amount of solvent increases.

Use the following chemical equation NaCl(s) + H2O(l) --> Na+(aq) + Cl-(aq) + H2O (l). Which of the following is the solute that is being dissolved into the solvent?

• NaCl

• H₂O

• Na

• Cl

Use the graph above. Which statement describes what happens to the substance graphed that is involved in the chemical reaction above?

• The concentration of the product decreases over time.

• The concentration of the reactant decreases over time.

• The concentration of the reactant increases over time.

• The concentration of the product increases over time.

Tags

NGSS.MS-PS1-2

What happens to the products of the reaction in the graph?

• The concentration of the product decreases over time.

• The concentration of the reactant decreases over time.

• The concentration of the reactant increases over time.

• The concentration of the product increases over time.

Tags

NGSS.MS-PS1-2

Use the following chemical reaction: CH4 + 2O2 → 2H2O + CO2. During this reaction, which statement correctly describes what is happening to the concentration of Methane (CH4) as this reaction continues?

• The concentration of methane increases as the reaction takes place.

• The concentration of methane decreases as the reaction takes place.

• The concentration of methane stays the same as the reaction takes place.

• The concentration of oxygen increases as the reaction takes place.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5