Inorganic Chemistry Answers

For a process to be defined as a chemical reaction, blank must be produced.

21.3 grams of salt E (NO3) 3 are dissolved in 500 ml of solution. The concentration of nitrate ions (NO3) - in this solution is 0.6mol / l. Knowing that the E atom contains 14 neutrons in the nucleus, determine the location of element in the periodic table

CO2 molecule has two types of bond length justify!

What is the pH of a solution containing 5.6 mg / L of KOH, assuming it is completely dissociated?

Calculate the pH of a solution of CH3COOH with 3.0 g of this acid in 500 mL of water. The ionization constant of this acid at 25oC is 1.8 x 10-5

Calculate or hydrolysis a 0.1 KCN solution at 25 oC. The HCN ionization constant is 7.0 x 10-10 and the ionic product of water is 1.0 x 10-14.

calculate the solubility of Mg(OH) in moles per liter if the solubility product of Mg(OH)2 is 5 x 10^12

calculate PH of 0.002 M HCl

4. a. Consider the data below for the reaction H2O(l) ⇌ H2O(g) .

Plot a graph and determine ΔH and ΔS for the reaction. Describe how they influence the
spontaneity of the reaction as a function of temperature.
T (°C) P (torr)
0.0 4.579
10.0 9.209
20.0 17.53
25.0 23.76
30.0 31.82
40.0 55.32
60.0 149.4
70.0 233.7
90.0 525.8



b. Explain how the boiling point temperature of H2O(l) (at sea level) can be accurately determined from the data in a.?


c. For the reaction in a., ΔE is less than ΔH. Explain.

250 mg of caco3 was dissolved in hcl and the solution was made 250 ml with distilled water. 50 ml of the above solution required 20 ml of edta solution [standardization part]. 50 ml of hard water sample consumed 25 ml of edta with ebt as indicator [total hardness]. calculate the total hardness of water sample in ppm.