Matter, Density, & Solutions Quiz

Maria is studying the processes of converting water into ice and water into steam. Which of these correctly explains one of these processes?

• When water changes to ice, the particles gain energy and the molecular motion increases.
• When water changes to steam, the particles gain energy and the molecular motion increases
• When water changes to ice, the molecular motion increases and the particles become electrically charged
• When water changes to steam, the molecular motion increases and the particles become electrically charged

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Four substances of equal volumes need to be used in an experiment. The substances are:   wood, water, helium, iron   All the substances exist at the same room temperature and atmospheric pressure. Which sequence shows them in the order of decreasing molecular motion?

• helium, water, wood, iron
• iron, wood, water, helium
• water, helium, iron, wood
• wood, iron, water, helium

Tags

NGSS.MS-PS1-4

At 30 ^o C, exactly 95 grams of this salt dissolved completely in 100 grams of water. According to the solubility chart, the salt is

• sodium nitrate.
• sodium chloride
• potassium iodide
• potassium chlorate

Tags

NGSS.MS-PS1-2

Which of these would be supported by the graph?

• More NaCl will dissolve at O^o C than KBr.
• More KNO₃ will dissolve than KBr at 0 °C.
• KBr is about twice as soluble as NaCl at 60°C
• Temperature greatly affects the solubility of NaCl.

 If 100 grams of potassium nitrate is dissolved in 100 cm³ of water at 60^oC, a(n) _______________ solution is formed.

• saturated
• unsaturated
• oversaturated
• supersaturated

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which solubility graph correctly depicts the increase of solubility associated with an increase of temperature of the solution?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-4

A saturated solution of lead(II) nitrate was made at 50 °C using 100 g of water, and this was then allowed to cool to 30 °C. Predict what would happen as the solution cooled?

• The solubility would decrease and some of the lead(II) nitrate would create a gel.
• The solubility would increase and some of the lead(II) nitrate would evaporate off.
• The solubility would decrease and all of the lead(II) nitrate would precipitate out.
• The solubility would decrease and some of the lead(II) nitrate would precipitate out.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If 180 grams of potassium iodide is dissolved in 100 cm³ of water at 30^oC, a(n) _______________ solution is formed.

• saturated
• unsaturated
• oversaturated
• supersaturated

Tags

NGSS.MS-PS1-2

Which compound demonstrated the GREATEST increase of solubility as a result of an increase in temperature?

• sodium nitrate
• sodium chloride
• potassium nitrate
• potassium chlorate

Tags

NGSS.MS-PS1-4

NaCl is common table salt and is an ionic compound. Table salt can be stirred into water to create a salt-water solution. What happens to the solubility of sodium chlorate, NaClO₃, as the temperature of the water rises?

• they increase
• they decrease
• they stay the same
• one increases and the other decreases

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4