Honors Matter Unit Review

James washed his clothes at the local laundromat. After washing them, he removed the clothes and noticed that the clothes had undissolved washing powder on them.

Which of the following could James do next time to help prevent this from happening and why?

• Wash the clothes in colder water, because lowering the temperature of the solvent increases the rate at which solutes dissolve.

• Wash the clothes in colder water, because lowering the temperature of the solvent decreases the rate at which solutes dissolve.

• Wash the clothes in hotter water, because raising the temperature of the solvent increases the rate at which solutes dissolve.

• Wash the clothes in hotter water, because raising the temperature of the solvent decreases the rate at which solutes dissolve.

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NGSS.MS-PS1-4

A maximum of 200 g of sucrose can be dissolved in 100 mL of water at 20°C.

If 150 g of sucrose are stirred in 100 mL of water at 20°C, what kind of solution will be formed?

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NGSS.MS-PS1-2

Which of these chemical equations demonstrates conservation of mass and why?

• Equation 1, because it is balanced.

• Equation 2, because it is balanced.

• Both equations, because they are balanced.

• Neither equation, because they are not balanced.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can she prove that the aluminum was conserved if it completely disappeared as soon as it touched the acid?

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NGSS.MS-PS1-2

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Three substances, in different states of matter, are placed in containers.

Which of the following statements is TRUE?

• Substance C can be compressed into a smaller volume.

• The molecules in substances A and B are able to move past each other.

• The volume of substance B will remain the same as pressure increases.

• All three substances will maintain the same shape when their containers are changed.

Which reaction follows the Law of Conservation of Mass?

• 3.2 g of methane reacts with 12.8 g of oxygen to form 7.2 g of water and 8.8 g of carbon dioxide

• 13.5 g of propane reacts with 70.3 g of oxygen to form 93.7 g of carbon dioxide and 16.0 g of water

• 6.4 g of methane reacts with 25.6 g of oxygen to form 17.6 g of carbon dioxide

• 20.0 g of hydrogen reacts with 5.0 g of chlorine to form 30.5 g of hydrochloric acid

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which reaction follows the Law of Conservation of Mass?

• 5.98 g of sodium reacts with 4.68 g of water to form 10.40 g of sodium hydroxide and 0.26 g of hydrogen

• 13.5 g of propane reacts with 70.3 g of oxygen to form 93.7 g of carbon dioxide and 16.0 g of water

• 6.4 g of methane reacts with 25.6 g of oxygen to form 17.6 g of carbon dioxide

• 20.0 g of hydrogen reacts with 5.0 g of chlorine to form 30.5 g of hydrochloric acid

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NGSS.MS-PS1-5

Which reaction follows the Law of Conservation of Mass?

• 30.0 g of hydrogen reacts with 240.0 g of oxygen to form 270.0 g of water

• 13.5 g of propane reacts with 70.3 g of oxygen to form 93.7 g of carbon dioxide and 16.0 g of water

• 6.4 g of methane reacts with 25.6 g of oxygen to form 17.6 g of carbon dioxide

• 20.0 g of hydrogen reacts with 5.0 g of chlorine to form 30.5 g of hydrochloric acid

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The table shows the procedure for investigating conservation of mass using Alka-Seltzer tablets. Which of the following would complete the missing numbers 3, 4, and 7 in the table?

• 3. Place the closed bottle back on the balance and measure its mass again.

  4. Record your initial observations to include colors and types of solutions or state of matter for each.

  7. Drop the Alka-Seltzer tablet into the the bottle with water and replace the cap.

• 3. Drop the Alka-Seltzer tablet into the the bottle with water and replace the cap.

  4. Record your initial observations to include colors and types of solutions/state of matter for each.

  7. Place the closed bottle back on the balance and measure its mass again.

• 3. Drop the Alka-Seltzer tablet into the the bottle with water and replace the cap.

  4. Place the closed bottle back on the balance and measure its mass again

  7. Record your initial observations to include colors and types of solutions/state of matter for each

• 3. Record your initial observations to include colors and types of solutions/state of matter for each.

  4. Drop the Alka-Seltzer tablet into the the bottle with water and replace the cap.

  7. Place the closed bottle back on the balance and measure its mass again.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The graph shows the solubility of salt and sugar in water at different temperatures.

At 100 0C, how does a solution with 100 grams of salt compares to a solution with 100 grams of sugar?

• The sugar solution is saturated and the salt solution is undissolved.

• The sugar solution is saturated and the salt solution is unsaturated.

• The salt solution is supersaturated and the sugar solution is unsaturated.

• The salt solution is unsaturated and the sugar solution is supersaturated.

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NGSS.MS-PS1-2

NGSS.MS-PS1-4