Hard water is water with high concentrations of dissolved...
Hard water is water with high concentrations of dissolved ions, in particular calcium and
magnesium ions
nitrogen ions
phosporus ions
helium ions
Correct answer is A
Hard water is water with high concentrations of dissolved ions, in particular calcium and magnesium ions
MnO2 + 2CI- + 4H+ → MnO2+ + CI2 + 2H2O. The changes is oxidation numbers when the manganese, chl...
Which of the following statements about an electrochemical cell is correct? Oxidation occurs ...
The hottest part of the gas flame is known as ...
Which of the following compounds dissolves in water to give an alkaline solution? ...