This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
here are the solutions to the questions: 1. (i) State what would be observed when ethanoic acid reacts with CaCO_3. When ethanoic acid (an acid) reacts with calcium carbonate (a carbonate), carbon dioxide gas is produced. The observation for the production of a gas is effervescence or fizzing. Effervescence (or fizzing) would be observed. 1. (ii) Calculate the volume of oxygen required to burn completely 4 moles of C_3H_8 at s.t.p. [H = 1.0, C = 12.0, O = 16.0, 1 mole of gas occupies 22.4 dm^3 at s.t.p.] Step 1: Write the balanced chemical equation for the complete combustion of propane (C_3H_8). C_3H_8(g) + 5O_2(g) 3CO_2(g) + 4H_2O(l) Step 2: Determine the mole ratio between propane (C_3H_8) and oxygen (O_2). From the balanced equation, 1 mole of C_3H_8 reacts with 5 moles of O_2. Step 3: Calculate the moles of oxygen required for 4 moles of C_3H_8. Moles of O_2 = Moles of C_3H_8 × 5 mol O_21 mol C_3H_8 Moles of O_2 = 4 mol × 5 = 20 mol Step 4: Calculate the volume of oxygen at s.t.p. Given that 1 mole of gas occupies 22.4 dm^3 at s.t.p. Volume of O_2 = Moles of O_2 × Molar volume at s.t.p. Volume of O_2 = 20 mol × 22.4 dm^3/mol Volume of O_2 = 448 dm^3 The volume of oxygen required is 448 dm^3. What's next?