EXERCISE - CHAPTER 7

1. A student pipetted 25.0 cm3 of sodium hydroxide, NaOH solution into a conical flask and filled a burette with 0.10 mol dm-3 hydrochloric acid, HCl to carry out a titration. He obtained an average volume of 22.0 cm3 hydrochloric acid, HCl. What was the molarity of the sodium hydroxide, NaOH solution?

2. What is the volume of 0.5 mol dm-3 sulphuric acid, H2SO4 needed to neutralize 25.0 cm3 of 0.8 mol dm-3 ammonia, NH3 solution?3. A sample of copper(II) oxide, CuO was found to completely neutralize 100 cm3 of 0.5 mol dm-3 hydrochloric acid, HCl. Calculate the mass of the sample.[Relative atomic mass: O,16; Cu,64 ]EXERCISE CHAPTER 8 1. Ammonium phosphate, NH4)3PO is used as a fertilizer. 29.8 g of this salt is prepared by neutralizing phosphoric acid, H3PO4 with ammonia gas, NH3. Calculate the volume of ammonia gas, NH3 reacted at room condition [ RAM : H, 1; N, 14; P, 31; O, 16. Molar Volume : 24 dm3 mol-1 at room conditions]

2. Silver salts such as silver iodide, AgI are used in photography. A sample of the insoluble silver iodide, AgI is prepared by mixing 50 cm3 of 1.0 mol dm-3 silver nitrate, AgNO3 solution and 50 cm3 of 1.0 mol dm-3 potassium iodide, KI solution. Calculate the mass fo silver iodide, AgL produced. [ RAM : Ag, 108; I,127 ]3. Acid reacts with calcium carbonate, CaCO3 in limestone to form a salt and carbon dioxide, CO2. A piece of limestone reacted completely with 100 cm3 of 31.5 g dm-3 nitric acid, HNO3. [RAM: H,1 ; C,12 ; N,14 ; O, 16 ; Ca, 40. Molar volume : 24 dm3 mol-1 at room condition] a) Calculate the mass of salt produceb) What is the volume of carbon dioxide, CO2 liberated at room conditions?

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