dgojordan799 dgojordan799 20-02-2024 Chemistry contestada What is the value of x in the context of water hardness analysis if 100 ml of a sample of hard water, with a hardness of 251 ppm based on CaCO₃, requires 25.1 ml of H₂SO₄ for complete reaction? a) 50 b) 100 c) 125 d) 150