Changes in Matter

Question 1

Do you have a copy of the Student Guide, PDF or Word, for this lab, including your data table?

Revolt · Accepted Answer

yes

Question 2

Have you gathered all the materials needed?

Revolt · Accepted Answer

yes

Question 3

Which answer below correctly identifies the type of change and the explanation for the change in calcium carbonate?

Revolt · Accepted Answer

physical change because even though a particle size change was observed, the calcium carbonate retained its original properties and was not transformed into a new substance

Question 4

Which answer below correctly identifies the type of change and the explanation for the heating of copper(II) sulfate pentahydrate?

Revolt · Accepted Answer

chemical change because gas was released along with a color change, which indicated that the copper(II) sulfate pentahydrate was transformed into a different substance

Question 5

Which answer below correctly identifies the type of change and the explanation for the mixture of calcium carbonate and hydrochloric acid?

Revolt · Accepted Answer

chemical change because gas formation was observed, which indicated that the calcium carbonate was transformed into a different substance

Question 6

Which answer below correctly identifies the type of change and the explanation for the boiling of water?

Revolt · Accepted Answer

physical change because even though gas formation was observed, the water was undergoing a state change, which means that its original properties are preserved

Question 7

Which answer below correctly identifies the type of change and the explanation for the separation of the iron with sulfur?

Revolt · Accepted Answer

physical change because even though a color change occured, each solid maintained its original properties, which could be seen as soon as the magnet was applied

Question 8

Which answer below correctly identifies the type of change and the explanation when potassium iodide and lead nitrate are mixed?

Revolt · Accepted Answer

chemical change because both a color change and a solid formation were observed, which provide strong evidence of a new substance

Question 9

Which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochloric acid?

Revolt · Accepted Answer

chemical change because a temperature change occurred, a solid disappeared, and a gas was produced

Question 10

Which answer below correctly identifies the changes you observed and the explanation when a candle burns?

Revolt · Accepted Answer

both physical change because the wax melted and changed shape and chemical change because light and heat were formed as the candle burned

Changes in Matter Answers

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