What to do
- Pick Percent or ppm mode.
- Enter the solute and solution amounts. Read the result.
- Check three rows by hand.
Controls
Data table
| Mixture | Measure | Result |
|---|
Copy your table onto your worksheet. No device? Use the ppm Card on the Teacher Prep page. Fill in the table from the card.
Check yourself
Why do we use ppm for things like lead or nitrate in water?
The amounts are very small, so a small unit is easier to use.
Is 20.0 g salt in 80.0 g water 20.0% or 25.0%?
20.0%. The solution mass is 100.0 g.
Which is bigger, 3.0 ppm or 10 ppm?
10 ppm.
Try each question first. Then tap it to check.