Mixtures Solubility and Acid Base Solutions

An increase in heat will tend to change the change the solubility of a solid and a gas in a liquid in which ways?

• It will increase the solubility of the solid and the gas.

• It will increase the solubility of the solid and reduce the solubility of the gas.

• It will reduce the solubility of the solid and increase the solubility of the gas.

• It will reduce the solubility of the solid and the gas.

What gas is produced when acids react with most metals?

• oxygen

• nitrogen

• sulfur

• hydrogen

Which of the following solutions is a base?

• household ammonia

• acid rain

• soft drink

• lemon juice

Tags

NGSS.HS-PS1-1

If a student places a few drops of hydrochloric acid on a piece of blue litmus paper, what will happen?

• It will stay blue.

• It will turn black.

• It will turn yellow

• It will turn red.

Which statement best describes how surface area affects a solid dissolving in water?

• An increase in surface area will make a solid stop dissolving.

• An increase in surface area will increase the speed of a solid dissolving.

• A decrease in surface area will make a solid begin dissolving.

• A decrease in surface area will increase the speed of a solid dissolving

The indicator phenolphthalein is colorless in an acid but changes color to pink in a base. A liquid with which pH would change the indicator pink?

• 9

• 5

• 3

• 7

Which of the following refers to the concentration of a substance?

• the size of the particles that make up a substance

• the maximum amount of a solute that can be dissolved in a solvent at a given temperature

• the grams of solute dissolved per 100 g of solvent

• the minimum volume of solvent dissolved per liter of solution at a given pressure

Tags

NGSS.HS-PS1-5

During an experiment, an acid (vinegar) was added at the same rate to two different liquids. Liquid A was distilled water; Liquid B was distilled water with a crushed antacid tablet stirred in. Which liquid became acidic first, as indicated by a change of litmus paper from blue to red?

• They changed at the same rate.

• Neither of them ever became acidic.

• Liquid B became acidic first.

• Liquid A became acidic first.

Tags

NGSS.MS-PS1-2

The combination of a solvent and a solute that cannot be separated by filtration makes a

• solution.

• colloid.

• suspension.

• compound

Riley's science teacher has given everyone a glass filled with a liquid. The teacher then asks everyone to figure out if their liquid has any dissolved solids in it. Riley thinks her liquid has dissolved solids. Which piece of evidence would support her idea?

• a clear, empty glass once the liquid evaporated out of the glass

• a white material left in the glass once the liquid evaporated out of the glass

• a clear, transparent appearance to the liquid when put under a bright light

• a change in the temperature of the glass when left on the table