. . "0"^^ . . "104937587"^^ . . "hardness"^^ . . "a quality of water that contains dissolved mineral salts that prevent soap from lathering; \"the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present\""@en-us . "04937587-n"^^ . . "hardness"@en-us . . . . "0.875"^^ .