Science Unit

The chemical name for marble is calcium carbonate. In the experiment shown below, equal masses of marble lumps, small marble chips and powdered marble were placed into equal volumes of dilute hydrochloric acid.

In which beaker reaction be fastest?

Tags

NGSS.MS-PS1-2

The chemical name for marble is calcium carbonate. In the experiment shown below, equal masses of marble lumps, small marble chips and powdered marble were placed into equal volumes of dilute hydrochloric acid.

Which factor affects the speed of reaction?

• Concentration

• Catalyst

• Surface Area

• Temperature

The chemical name for marble is calcium carbonate. In the experiment shown below, equal masses of marble lumps, small marble chips and powdered marble were placed into equal volumes of dilute hydrochloric acid.

How would you test for this gas and what would tell you that the test is positive? Tick (/) two correct answers.

• To test for hydrogen you use a lighted splint

• The test for carbon dioxide is to bubble it through limewater

• If the gas burns with a squeaky pop then the gas is hydrogen.

• If the gas is carbon dioxide the limewater will turn milky

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When the reaction between the calcium carbonate and dilute acid occurs, carbon dioxide gas is given off.

What is the name of the salt formed in this reaction?

Tags

NGSS.MS-PS1-2

Samuel was investigating the reaction below. He placed 4 g of magnesium ribbon into a beaker of dilute sulfuric acid. He timed how long it took for the magnesium to ‘disappear’. It took 45 seconds.

Which is the correct word equation for the reaction between magnesium and sulfuric acid?

• magnesium + sulfuric acid --> magnesium sulfide + hydrogen

• magnesium + sulfuric acid --> magnesium sulfate + water

• magnesium + sulfuric acid --> magnesium sulfide + carbon dioxide

• magnesium + sulfuric acid --> magnesium sulfate + hydrogen

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Samuel was investigating the reaction below. He placed 4 g of magnesium ribbon into a beaker of dilute sulfuric acid. He timed how long it took for the magnesium to ‘disappear’. It took 45 seconds.

How would you test for the gas given off in this reaction?

Tick (/) 2 correct answers.

• To test for hydrogen you use a lighted splint

• The test for carbon dioxide is to bubble it through limewater

• If the gas burns with a squeaky pop then the gas is hydrogen.

• If the gas is carbon dioxide the limewater will turn milky

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Samuel was investigating the reaction below. He placed 4 g of magnesium ribbon into a beaker of dilute sulfuric acid. He timed how long it took for the magnesium to ‘disappear’. It took 45 seconds.

Which of the following would result in the magnesium ribbon ‘disappearing’ in less than 45 seconds?

• Warming the acid

• Using 5 g magnesium ribbon

• stirring the mixture

• adding water to the acid

Tags

NGSS.MS-PS3-4

Bahula investigates the rate of reaction between magnesium and dilute hydrochloric acid.

She measure how much gas is given off every 30 seconds. The graph show her results.

How long does it take to collect 50 cm3 of the gas?

Tags

NGSS.MS-PS1-2

Bahula investigates the rate of reaction between magnesium and dilute hydrochloric acid.

She measure how much gas is given off every 30 seconds. The graph show her results.

Which prediction is TRUE if Bahula increased the temperature of the acid?

• The rate of reaction will be slower

• The rate of reaction will be faster

• The rate of reaction will stay the same

• The rate of reaction will remain constant

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Angelique and Mike decide to make copper chloride.

They mix copper carbonate with an acid.

Write the name of the acid they use.