At 10 degrees, how many grams of NaNO₃ are needed to make a saturated solution?

• 10 grams

• 90 grams

• 80 grams

• 70 grams

Tags

NGSS.MS-PS1-4

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.MS-PS1-2

NGSS.MS-PS1-4

Generally speaking, a substance dissolves better

• at higher temperatures
• at lower temperatures 

Tags

NGSS.MS-PS1-4

You and your friend have a contest to see who can brew tea the fastest by dissolving tea bags in water. Which of the following would NOT help you win?

• Cooling the water to brew the tea leaves

• crushing the tea leaves into smaller pieces

• Heating the water to brew the tea leaves

• Stirring or swirling the tea bags in the water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A solution of hydrogen chloride (HCl) has 30 grams dissolved in 100 g of water at 60°C. Is this solution saturated, unsaturated or supersaturated?

• saturated

• unsaturated

• supersaturated

Which of the following is considered the universal solvent?

• Salt

• Chocolate syrup

• Water

• Sugar

What is a solute?

• The substance that does the dissolving in a solution.
• The substance that is dissolved into the solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

Which of these is NOT a factor that increases solubility?

• agitation/stirring

• increasing temperature

• increasing surface area by crushing the solute

• adding red dye or food coloring

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

Which is an example of a solute?

• Milk with chocolate syrup

• Sugar being dissolved in tea

• Water with ice

• Ginger Ale