The ion that may be assumed to have negligible concentrat...
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
Mg+
K+
CO22-
HCO3
Correct answer is A
Calcium and magnesium ions (particularly calcium) negatively influence cleansing power of detergents, because these form nearly insoluble salts with soap. When the water lathers readily, it means these ions are in negligible concentration in the water.
Sodium metal is always kept under oil because it ...
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen? [H = 1, O = 16] ...
Which of the following statements is incorrect? ...
CO(g) + H2O(g) → CO2(g) + H2(g) From the reaction above, calculate the standard enthalpies of for...
Which of the following statements is correct about the periodic table? ...