What does alkalinity of water mean in practice?
In water analysis, alkalinity is usually synonymous with titratable alkalinity, rather than a simple term for a pH above 7.
When does it matter?
Water may have alkaline pH and low buffer capacity, or vice versa, so the terms should not be interchanged.
Which solutions are related to it?
The titration method and endpoint are reported and the result is recorded as mmol/l or mg CaCO3/l.