Problem 1:
What is a mixture?
Do Research:
What do you know about mixtures?
Use qualitative and quantitative observations.
Hypothesis:
If it is a mixture then ___________________________.
Procedure:
1. Look at the mixture in Bag A. What do you see? Record
observations in your Data section.
2. Measure the total mass of the mixture using the
electronic balance. *REMEMBER TO SUBTRACT THE MASS OF
THE ZIPLOC BAG*
3. Separate the parts of the mixture and find the mass of
each group. Use the formula provided to calculate the
percentage for each part of the mixture.
Observations/Data Table
Data Analysis
1. Do you accept or reject your hypothesis? Prove your
answer with DATA from the lab. *Stating my data table
shows is NOT ACCEPTABLE!*
2. Is the “mixture” in Bag A be homogeneous or
heterogeneous? Prove your answer with data.
3. Identify 2 homogeneous mixtures and explain why you
believe it is homogeneous.
4. Identify 2 heterogeneous mixture and explain why you
believe it is heterogenous.
Problem 2:
Why does a piece of candy
dissolve faster in different
scenarios?
Do Research:
What do you know about solutes? solvents?
solutions?
What do you know about the makeup of candy?
Use qualitative and quantitative observations.
Hypothesis:
If the substance is a solvent then
___________________________.
Procedure:
***Read the steps below FIRST, then obtain 3 pieces of M&M
candy from your teacher. You will need 3 pieces for each
group member.
1.
2.
3.
Place one piece of candy in your mouth and
using your tongue or teeth to help! Record
for the candy shell to dissolve.
Place another piece of candy in your mouth
only your tongue to move it around. Record
for the candy shell to dissolve.
Place another piece of candy in your mouth
your tongue and teeth. Record the time (in
shell to dissolve
allow it to dissolve without
the time (in seconds) it takes
and allow it to dissolve using
the time (in seconds) it takes
and allow it to dissolve using
seconds) it takes for the candy
Observations/Data Table
Data Analysis
1. Do you accept or reject your hypothesis? Prove your
answer with DATA from the lab. *Stating my data table
shows is NOT ACCEPTABLE!*
2. Explain the results of your experiment in terms of
dissolving rate or the time it takes for a substance to
dissolve.
3. What acted as the solute in the investigation? Why?
4. What acted as the solvent in the investigation? Why?
5. Identify the solute(s) and solvent in each solution. Underline the solute
and circle the solvents.
Ocean water - Salt and water
Kool-Aid - Powder, sugar, and water
Antifreeze - Water and ethylene glycol
Lemonade - Water, lemon juice, sugar
Soda Pop - Syrup, water, and CO2 gas
Air - Nitrogen, oxygen, and other gases
6) What liquid is called the “universal solvent”? Why is this
liquid considered the universal solvent? Describe the chemistry
that explains this phenomenon.
7) Which would have the most SOLUTE: a glass of very sweet
Kool-Aid or a glass of barely sweet Kool-Aid? Give a reason for
your answer.