Matter and Solutions (T)

In the experiment, the __________ tablet dissolved the fastest because it had the __________.

• whole; highest surface area

• whole; lowest surface area

• quartered; lowest concentration

• crushed; highest temperature

• crushed; highest surface area

Tags

NGSS.MS-PS1-2

Which statement best describes the concentration of the solutions made from the dissolved vitamin C tablets?

• The solution with the whole tablet has the highest concentration because the tablet was in one piece.

• The solution with the crushed tablet has the lowest concentration because the tablet was in many pieces.

• All three solutions had a concentration of zero because the tablets completely dissolved in the water.

• All three solutions have the same concentrations because the amounts of water and solute were the same.

Tags

NGSS.MS-PS1-2

Which two experiments would examine ways to change the rate of dissolution?

• Use crushed, quartered, and whole tablets with varying sizes.

• Use a crushed, quartered, and whole tablet, and measure the amount of water evaporated following heating.

• Use full tablets in each trial but use a different temperature of water for each container.

• Use full tablets in each trial, but increase the amount of water used to dilute the Vitamin C tablet.

• Use full tablets in each trial and stir each tablet a different number of times when dissolving.

Which of the following statements accurately describe the two substances in Image A and Image B? Choose two answers.

• Images A and B are both composed of carbon and oxygen.

• Images A and B are both molecules containing 2 atoms of oxygen.

• Images A and B are both compounds containing only 2 atoms of oxygen.

• Image A is an element and image B is a compound.

• Image A is a compound and image B is an element.

Tags

NGSS.MS-PS1-1

An antacid is a medication that is used to help calm heartburn. Some antacid tablets contain two compounds that dissolve when the tablet is placed in water. When these compounds dissolve into solution, they react with each other and form two different compounds, one of which is carbon dioxide (CO₂) gas. The person then drinks the dissolved solution. This type of antacid tablet is a __________ that dissolves into the _______, water. This is a __________ change. Once in solution, the __________ react to form a gas which is evidence of a __________ change. Which terms best complete the sentences?

• solute; molecule; chemical; solvents; physical

• solvent; solute; physical; molecules; chemical

• solvent; solute; chemical; molecules; physical

• solvent; solvent; chemical; molecules; chemical

• solute; solvent; physical; molecules; chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A glass of lemonade with ice in it sits outside in the Texas summer heat. Before long the ice begins to melt. Which of the following has occurred? Select two answers.

• A. The ice has melted, which is a chemical change.

• B. The ice has melted, which is a physical change.

• C. The lemonade has been diluted by the water from the melting ice.

• D. The water from the melting ice has been diluted by the lemonade.

• E. The water from the melting ice has not diluted the lemonade.

The chemical formulas of three substances are recorded: C₃H₈O, C₄H₁₀O, C₅H₁₂O. These compounds contain the same __________ because each formula has the same __________. They are different compounds because they have different __________. Which terms best complete the sentences?

• molecules; chemical formulas; chemical symbols

• elements; chemical formulas; chemical symbols

• molecules; chemical symbols; chemical formulas

• elements; chemical symbols; chemical formulas

Tags

NGSS.MS-PS1-1

A student wants to test how temperature affects the speed a solute dissolves in an aqueous solution. The student plans to conduct three trials of the same solute and solvent. What will likely happen during the student’s experiment?

• As the temperature increases, the solute will dissolve slower into the solution.

• As the temperature increases, the solute will not dissolve into the solution.

• As the temperature increases, the solute will dissolve faster into the solution.

• As the time to dissolve increases, the speed at which the solute dissolves will not change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which option correctly identifies the type and number of each atom found in glucose?

• Glucose contains 24 atoms of carbon, 24 atoms of hydrogen, and 24 atoms of oxygen.

• Glucose contains 6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen.

• Glucose contains 6 atoms of carbon and 18 atoms of holmium.

• Glucose contains 12 atoms of cobalt and 12 atoms of hydrogen.

Tags

NGSS.MS-PS1-1

What is the simplest way to get salt to dissolve in water?

• Heat the water so the salt dissolves and then cool it back down again.

• Crush the granules of salt into a finer powder.

• Add ice to cool the salt even more so the salt dissolves.

• Stir the solution with a stick so the salt will dissolve.