Hydrogen Questions and Answers
![A sample of water is found to contains following dissolving salts in milligrams per litre
Mg(HCO3)2 = 73, CaCl2 = 111, Ca(HCO3)2 = 81, MgSO4 = 40 and MgCl2 = 95. Calculate temporary and permanent hardness and total hardness.](https://media.kunduz.com/media/sug-question/raw/64682599-1657461467.950283.jpeg?w=256)
Inorganic Chemistry
HydrogenA sample of water is found to contains following dissolving salts in milligrams per litre
Mg(HCO3)2 = 73, CaCl2 = 111, Ca(HCO3)2 = 81, MgSO4 = 40 and MgCl2 = 95. Calculate temporary and permanent hardness and total hardness.
![1) A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of Ka for HA is
A) 1.3 x 10^-10
B) 3.0 × 10^-5
C) 1.8 x 10^-5
D) 7.1 x 10^-9
E) 3.3 x 10^4](https://media.kunduz.com/media/sug-question/raw/62632397-1657456518.239715.jpeg?w=256)
Inorganic Chemistry
Hydrogen1) A 0.15 M aqueous solution of the weak acid HA at 25.0 °C has a pH of 5.35. The value of Ka for HA is
A) 1.3 x 10^-10
B) 3.0 × 10^-5
C) 1.8 x 10^-5
D) 7.1 x 10^-9
E) 3.3 x 10^4