Rainbow Density Lab (Page 2 of 4) in pdf

Rainbow Density Lab Page 2

iv. Add the amount of salt specified in the Solution Chart to the beaker.

Adjust the triple beam balance until the desired mass is obtained (This is

the mass calculated in step ii).

v. Use water from your sink and obtain 25 mL of water, measured in the

graduated cylinder.

vi. Pour the 25 mL of water into the beaker that has the salt in it.

Stir the

solution until the salt is completely dissolved.

vii. Mass the beaker with the salty water in it.

Record the mass in the data

table.

viii. Repeat steps ii-v for Solution B and Solution C, using the different beaker

each time.

VI. Discussion Questions:

a. Day 1:

i. How do the volumes of the solutions compare to one another? Does adding

different amounts of salt increase the volume at different levels? ___________

___________________________________________________________________

ii. How do the masses of the solutions compare to one another? ________________

___________________________________________________________________

iii. Calculate the density of each solution. Find the mass of the solution from the

Data Table, in the column labeled “Mass of Salt and Water.”

Find the volume

of the solution from the “Solution Chart” on page 1.

Solution

Density (Density= Mass/Volume)

iv. Predict what you think will happen if the solutions were put into a test tube.

If Solution A was red, Solution B was yellow, and Solution C was blue, draw

what you think the test tube would look like. ____________________________

___________________________________________________________________

Rainbow Density Lab Page 2