Exploring Physical and Chemical Changes in the Lab

What happens when sodium bicarbonate is mixed with acetic acid in a test tube?

• It releases a gas and forms bubbles

• No reaction occurs

• It forms a solid precipitate

• It changes color

Tags

NGSS.MS-PS1-2

What safety equipment is mentioned for use during the experiments?

• Ear protection

• Safety goggles

• Lab coat

• Gloves

Tags

NGSS.MS-PS1-6

What is the purpose of using a mortar and pestle with Tums tablets?

• To dissolve them in water

• To observe their color change

• To crush them into a fine powder

• To increase their temperature

What type of reaction occurs when Tums is mixed with hydrochloric acid?

• Exothermic reaction

• Precipitation reaction

• Endothermic reaction

• No reaction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the role of the fume hood in the experiment with hydrochloric acid?

• To maintain the temperature

• To measure the volume of acid used

• To prevent acid spills

• To contain and vent fumes

What does phenolphthalein indicate in an experiment?

• Presence of water

• Presence of a base or acid

• Volume of the solution

• Temperature of the solution

What color does phenolphthalein turn in a basic solution?

• Red

• Blue

• Pink

• Yellow

What is observed when sodium hydroxide is added dropwise to the acetic acid and phenolphthalein mixture?

• The solution turns permanently pink

• The solution turns temporarily pink then clear

• The solution bubbles vigorously

• The solution turns black

Tags

NGSS.MS-PS1-2

What happens to sugar when added to water?

• It forms a gas

• It changes color

• It dissolves

• It forms a precipitate

Tags

NGSS.MS-PS1-2

Why is it easier for sugar to dissolve in warm water?

• Warm water reduces the sugar's melting point

• Warm water decreases the density of sugar

• Warm water changes the chemical structure of sugar

• Warm water increases the kinetic energy of molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4