Words similar to hardness

Example sentences for: hardness

How can you use “hardness” in a sentence? Here are some example sentences to help you improve your vocabulary:

Reagents for hardness and alkalinity tests (see USEPA Methods 130.
hardness, 80-100 mg/L as CaCO3).
Tests performed at 20EC ±2EC; dilution water hardness, 100mg/L as CaCO3; dilution water alkalinity, 76 mg/L as CaCO3; effluent hardness, approx. 1000 mg/L as CaCO3; effluent alkalinity, 310 mg/L as CaCO3; effluent dilutions - 56%, 32%, 18%, 10%, 5.6%, 3.1%, 1.7%.
3 Pimephales promelas tests were performed in soft, synthetic freshwater; total hardness, 40-48 mg/L as CaCO3, by J. Dryer, Aquatic Biology Section, EMSL-Cincinnati.
The measured pH, hardness, etc., should be as listed in Table 3.