Other Chemistry Answers

1. Two bottles at the same temperature containing hydrogen sulphide (H2S) and ammonia (NH3) are placed at equal lengths from you and are opened at the same time. Which gas would you smell first?

calculate normality and titre of koh -solution (volume 5.45 ml) if it is necessary for the titration 6.7 ml h2so4-solution with cn=0.1025 mol/l

A solution of HClO4 was standardized by dissolving 0.4008 g of primary-standard-grade HgO in a solution of KBr:

HgO(s) + 4Br- + H2O  HgBr42- + 2OH-

The liberated OH- consumed 43.75 mL of the acid. Calculate the molar concentration of the HClO4.

Balance in acidic medium. Show step by step process.

Iron (solid) reacts with hydrochloric acid (liquid) to form aqueous iron(II) chloride and gaseous

hydrogen.

1. Balance in acidic medium. Show step by step process.

Iron (solid) reacts with hydrochloric acid (liquid) to form aqueous iron(II) chloride and gaseous hydrogen.

2. Balance in acidic medium. Show step by step process.

𝑁𝑂2− + 𝐴𝑙(𝑠) → 𝑁𝐻4+ (𝑎𝑞)

(𝑎𝑞)

+ 𝐴𝑙𝑂2−

(𝑎𝑞)

3. Balance the following reaction in basic medium. Show step by step process.

𝑆 𝑂2− + 𝑁𝑖(𝑂𝐻) → 𝑆𝑂2− + 𝑁𝑖𝑂

2 8(𝑎𝑞) 2(𝑠) 4(𝑎𝑞) 2(𝑠)

Suppose that a machine part requires 400 mg of copper to provide a coating that is thick enough for a certain electrical function. If you run an electrolysis using copper(II) ions for 10 minutes at a current of 0.5 A, will you meet the requirement?