AnswersPA-Science 8 Q1Types of Chemical Reactions

Lab: Rate of Chemical Reactions Answers

13 verified answers
1
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X temperature and use of a catalyst✔ temperature and surface areasurface area and concentrationconcentration and use of a catalyst

Answers:
In this experiment, were intentionally manipulated. These were the independent variables.:temperature and surface area
The dependent variable measured was .:time of the reaction
2
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color of the reactiontemperature of the reaction✔ time of the reactionamount of gas produced by the reaction

A
color of the reaction
B
temperature of the reaction
C
✔ time of the reaction
D
amount of gas produced by the reaction
3

Which observation was a sign that a chemical reaction was occurring in this experiment?

A
formation of a solid
B
change in color
C
formation of gas bubbles
D
production of light
4

Question text not available

Answers:
Selection 1:The rate is faster.
Selection 2:28 seconds
12

Which procedures were followed in this lab to decrease experimental error? Check all that apply.

A
repeating the experiment three times for each temperature
B
changing the volume of solution during each step
C
using three different temperatures instead of only two
D
using different types of antacids with different chemical formulas
E
using three different surface areas instead of only two
13

Cold water and powdered lemonade Cold water and lemonade tabletsWarm water and powdered lemonade Warm water and lemonade tablets

A
Cold water and powdered lemonade
B
Cold water and lemonade tablets
C
Warm water and powdered lemonade
D
Warm water and lemonade tablets

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