Lab: Acids and Bases

Question 1

Obtain a copy of the Student Guide for this lab. Your teacher may provide a copy, or you can click the link to access it. Be sure to read the entire Student Guide for this lab. Did you read the Student Guide carefully?

Revolt · Accepted Answer

yes

Question 2

What did you include in your hypothesis? Check all that apply.

Revolt · Accepted Answer

The “if” part of your hypothesis refers to the physical characteristics of the solution.; The “then” part of your hypothesis refers to a measureable difference in pH.; The “because” portion of your hypothesis connects the ideas of pH and H+ concentration.

Question 3

How would you best describe the yellow-green solution labeled “11”?

Revolt · Accepted Answer

basic

Question 4

The independent variable, the one that is intentionally manipulated, is .

Revolt · Accepted Answer

the physical properties

Question 5

Does taking 1 mL of solution Y (pure bleach) out of the first beaker change the solution’s concentration?

Revolt · Accepted Answer

no

Question 6

What would the concentration of the second beaker be?

Revolt · Accepted Answer

1/100th of solution Y

Question 7

How would you best describe the red or pink solutions labeled “2-4”?

Revolt · Accepted Answer

acidic

Question 8

How would you best describe the purple to blue solution labeled “7”?

Revolt · Accepted Answer

neutral

Question 9

Which statements are part of the safety protocol for this lab experiment? Check all that apply.Behavior in the lab needs to be purposeful. Exercise caution when using the hot plate, as it can cause burns.Ice used in this lab can melt quickly. Be sure to insulate your containers.Label your glassware and paper cups clearly and appropriately. Many chemicals appear to be the same.Check glassware, such as beakers and test tubes, for cracks and chips prior to use.A fume hood should be used to collect any potentially harmful vapors.Wear the right gear, such as chemically resistant gloves and oven mitts, when performing the experiment.

Revolt · Accepted Answer

Behavior in the lab needs to be purposeful. Exercise caution when using the hot plate, as it can cause burns.; Label your glassware and paper cups clearly and appropriately. Many chemicals appear to be the same.; Check glassware, such as beakers and test tubes, for cracks and chips prior to use.; Wear the right gear, such as chemically resistant gloves and oven mitts, when performing the experiment.

Question 10

The dependent variable, the one that you measure the response in, is .

Revolt · Accepted Answer

the pH of the solution

Lab: Acids and Bases Answers

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