Inorganic Chemistry Answers

Write the equation of the corresponding states and explain the meaning of the terms involved in it.

 A sample of water on analysis has been found to contain the following in ppm Ca(HCO3)2 = 10.5; Mg(HCO3)2 = 12.5; CaSO4=7.5; MgSO4 = 2.6; CaCl2 = 8.2; Calculate temporary, permanent and total hardness of the water sample in degree Clark and degree French. (Atomic masses Mg = 24; and Ca = 40).

20 ml of standard hard water (containing 15gms of CaCO3 per 500 mL) required 25 mL of EDTA Solution for titration. 100 ml of water sample required 18 mL EDTA Solution, while same water after boiling required 12 mL EDTA solution. Calculate carbonate and non-carbonate hardness of water in PPM.

A sample of water contains: suspended matter = 100 mg; Ca(NO3)2 = 16.4 mg/L; MgSO4 = 24 mg/L; MgCl2 = 19 mg/L; NaOH = 40 mg/L and KOH = 56 mg/L. Calculate temporary, permanent and total hardness of the water sample in PPM.

A sample of CO₂ gas at 25 ºC has a volume of 15 L and exerts a pressuer of 15.6 psi. How many grams of gas are in the sample?

100 mL of NaCl solution was titrated with 50 mL of 0.2 M AgNO3 solution. How many grams of AgCl were produced? M(AgCl)=143.2 g/mol

 A cache of Hebrew manuscripts known as the Dead Sea Scroll was found in 1947. The specific activity of Carbon-14 in the linen wrappings of the book of Isaiah was about 0.200 disintegration per second per gram (dps g-1.). Carbon-14 in living materials has

a specific activity of 0.255 dps g-1. The half-life of Carbon-14 is

5.73 x103 years. Carbon-14 decay by First order rate law. Calculate the approximate age of the linen.

2

For a liquid what is, meant by its coefficient of viscosity? 

Give the classification of stoichiometric defects in solids.

Describe body-centred cubic crystals with a suitable diagram