Factors Affecting Rates of Dissolving WB Quiz

Jazz wants to find which factors would increase the rate that sugar dissolves in water. First, she dissolves sugar in water at two
different temperatures. Next, she keeps the temperature the same but tries two different forms of sugar that have different surface
areas (cube and granulated). Finally, she keeps the temperature and the form of sugar the same, but tests the affect of stirring
the sugar into the water. Each time she records the rate the sugar dissolves in grams per minute. Her results are recorded in the
table below.

Using Leonard’s data, how did the higher temperature affect the rate that sugar dissolved?

Mr. Spivey is planning a science lab in which students will identify conditions that do and do not speed up the time required for salt to dissolve in water.  Which of the following conditions will NOT have an effect on the dissolving time?

Kelvin decided to conduct an experiment to determine whether stirring affects the rate at which an antacid
dissolves.  He predicted that the faster he stirs, the less time it would take the antacid to dissolve.

Kelvin’s Data Table:

Based on the data in the table, it can be stated that the data

Diamond is looking for examples of substances that will dissolve in water. She experiments with some things she finds in her kitchen at home. Which of these will NOT dissolve in water?

Accura wanted to surprise her family by making cookies. She found a recipe to make shortbread cookies. She needs butter, sugar, flour, baking powder, vanilla, and salt.

Which of the foods in Accura’s recipe will NOT dissolve in water?

Nick put some sugar in a pitcher of iced tea.

Why is Nick stirring the iced tea?

Trey is making soup. He will dissolve cubes of instant soup mix in hot water.

How can Trey make the soup cubes dissolve more quickly in the water?

Kennedy is using powdered mix to make hot chocolate. She will boil some water and then stir in the mix.

What is the best way to make the powdered mix dissolve more quickly?

Antwann and Adrian fill two cups with water. They use hot water in one cup and cold water in the other cup. Next, they will stir a spoon of salt into each cup.

In which cup will the salt dissolve more slowly?

Na’Asia and Z’Niyah each dropped a sugar cube into a beaker of water.  Z’Niyah’s sugar cube dissolved faster.

What could be a reason that Z’Niyah’s sugar cube dissolved faster?

Zion put the same amount of salt into these two beakers of water.  He stirred them into the same amount of water.

In which beaker does the salt dissolve more quickly?

Eyaja and Jayla used some sugar cubes to make lemonade.

How can they make the sugar dissolve more quickly?

Select ALL of the factors that will increase the rate of a solute dissolving into a solution.

Alka Seltzer can be taken by drinking a cup of water in which an alka seltzer tablet has been dissolved.  It can take several minutes for an aspirin table to dissolve.  Several variable can be tested to see whether they influence the rate of this process:

1.  surface area
2. pressure
3. temperature
4. concentration

For the dissolving process, which would be the most significant variables affecting rate of dissolving?

Put the following descriptions by their correct terms.