Carbon monoxide reacts with oxygen to form carbon dioxide by the following reaction: 2 CO(g) + O2(g)→ 2 CO2(g)

Balance the following redox reaction in an acidic solution: UO22+(aq)+Zn(s)->U4+(aq)+Zn2+(aq)

1. An impure sample of compound A is contaminated with two impurities B and C. The sample is to be purified by recrystallization using ethanol as the solvent. The solubility properties of the three components are summarized below. Solubility in Solubility in ethanol Solubility in 50 mL Solubility in 50 mL ethanol at -78 °C at - 0°C ethanol at -78 °C ethanol at - 0°C (g) (g) Compound A 0.12 g/mL 0.02 g/mL Impurity B 0.58 g/mL 0.04 g/mL Impurity C 0.005 g/mL 0.0003 g/mL The impure (7.5 g) sample contains 5.0 g of compound A, 1.5 g of B and 1.0 g of C and is recrystallized using 50 mL of ethanol. The sample is boiled with 50 mL of ethanol, filtered by gravity and then cooled in ice and filtered by suction. a) How much compound A should be obtained as the final product? Will the sample be contaminated with any of the impurities? Explain (using calculations to support your answer-fill in the missing masses in the table above). Hint: For this question you should calculate the mass of each…

Standard Gibbs energy of formation, in kJ mol, at 25°C + 124.5 Benzene, C6H6(1) Carbon dioxide, CO2(g) Carbon monoxide, CO(g) - 394.4 – 137.2 Cyclohexane, C6H12(1) + 26.7 Ethanoic acid, CH3COOH (1) - 299.8 - 174.8 Ethanol, C2H$OH(1) Water, H20(1) - 237.1 1. Calculate the standard Gibbs energy change for the following reactions at 25°C: (а) С>H:ОН() + O2(g) > CH-СООН() -+ H2O(1) (b) 2 CO2(g) → 2 CO(g) + O2(g) Which of the above reactions, as written, is spontaneous at the standard state? [- 362.1; +514.4]