AnswersISP ONLY Chemistry S1 Q3000XXLab: Physical and Chemical Changes

Lab: Physical and Chemical Changes Answers

10 verified answers
1
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Which reactions performed in the experiment involved chemical changes?

A
crushing calcium carbonate
B
mixing calcium carbonate and HCl
C
boiling water
D
heating copper (II) sulfate pentahydrate
E
separating iron filing and sulfur
F
mixing potassium iodide and lead nitrate
G
combining magnesium and HCl
H
burning the candle
2
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Refer back to your data. List all indicators of chemical change that you observed.

Answer:

gas, temperature changes.

3

Check all changes that you listed.

A
formation of a gas
B
formation of a precipitate
C
color change
D
temperature change
E
production of light
4

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5

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8

Which real-world scenarios below represent physical changes? Check all that apply.

A
running a car engine
B
exploding fireworks
C
mixing water and powdered drink mix
D
combining oil and vinegar to make salad dressing
E
taking aspirin for a headache
F
diluting bleach with water
G
digesting Thanksgiving dinner
H
spreading peanut butter on bread
9

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10

Therefore, rust is a change.

A
physical
B
chemical
C
physical AND chemical
13

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14

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