Ion detective
Add test solutions, collect evidence and identify the unknown sample.
Mission 1 of 3
123
Which ion is in the unknown sample?
Choose a test solution. Each test uses a fresh portion of the sample.
Tap the lab or use the buttons below
NaCl(aq)
Not tested yet
Na₂CO₃(aq)
Not tested yet
Detective card
| Ion | + NaCl | + Na₂CO₃ |
|---|---|---|
| Na⁺ | Clear | Clear |
| Ca²⁺ | Clear | Precipitate |
| Ag⁺ | Precipitate | Precipitate |
Use your observations as evidence.
Tap a bottle to perform your first test.
The sample is a nitrate solution containing one of these three cations. Assume concentrations are high enough for a visible precipitate.
3 missions without a failed attempt = one star. No time limit.