Here’s a version of the types of gravimetric analysis:
1. Precipitation Method
- Substance is turned into a solid.
- Solid is filtered, dried, and weighed.
Example: Chloride measured as silver chloride (AgCl).
2. Volatilization Method
- Substance is turned into a gas.
- Weight of the gas or weight loss is measured.
Example: Finding water by heating a compound.
3. Electro-gravimetric Method
- Substance is deposited on an electrode using electricity.
- Weight of the deposited material shows the amount present.
Example: Measuring copper by depositing it on a platinum electrode.
4. Thermal (Gravimetric) Method
- Sample is heated, and weight change is measured.
- Shows decomposition or loss of gases.
Example: Decomposition of calcium oxalate to calcium oxide.
In short:
- Precipitation → weigh solid
- Volatilization → weigh gas or loss
- Electro-gravimetric → weigh deposited metal
- Thermal → weigh after heating