Drag the thermometer to control the temperature. Gel contains potassium hexacyanoferrate(III) (detects Fe²⁺ as blue) and phenolphthalein (detects OH⁻ as pink).
25°C
9V DC
READY
Ready. Adjust the temperature and click 'Start Investigation'.
25°C
9V DC
READY
Ready. Adjust the temperature and click 'Start Investigation'.