[ CaCO_3 + 2HCl \rightarrow CaCl_2 + H_2O + CO_2 \uparrow ]
| Sample ID | Dry Mass (g) | CO₂ Reading (mL) | CaCO₃ Equivalent (%) | |-----------|--------------|------------------|------------------------| | S-01 (CL) | 5.00 | 38.5 | 10.2 | | S-02 (GW) | 10.00 | 122.0 | 32.8 | astm d 4373
The method relies on the chemical reaction between carbonates present in the soil and hydrochloric acid (HCl). The reaction produces carbon dioxide (CO₂) gas. [ CaCO_3 + 2HCl \rightarrow CaCl_2 + H_2O
D4373 – 14 (or current active version: 2021) astm d 4373