A cylinder of potato has a mass of 6.0 g.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A cylinder of potato has a mass of . It is placed in a strong salt solution for one hour, and then its mass is . Find the percent change in mass. In which direction did the water move?
Need a reminder? The key ideaShow
Percent change = (after − before) ÷ before × 100. A loss is negative.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The change. .
Step 2. Percent. .
Step 3. Direction. The potato lost water, so water moved out of its cells into the strong solution.
Answer: ; out of the potato.
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