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- Balanced chemical equation for conversion of Al(s) to KAl(SO4)2·12H2O(s) in aqueous solutionGiven: 2MNO(s) + O2(g) → 2MnO2(s) ArH = –269.6 kJ · mol-12 K(s) + 2 H2O(l) → 2 KOH(aq) + H2(g) AH-393 kJ/molræn When 3.9 g of K(s) is added to 200. mL of water at 25°C in a calorimeter, all the K(s) reacts with the water as represented by the equation above. Which of the following is true about the pH of the water after the reaction is complete? (A) pH 7 The pH of the water cannot be determined without additional information.
- When a current is passed through a solution of salt water, sodium chloride decomposes according to the following reaction: 2NaCl + 2H2O → 2NaOH + Cl2 + H2 What is the chemical symbol for the starting substance? What is the chemical symbol for the ending substance?Calculate the enthalpy of decomposing hydrogen iodide to produce hydrogen and iodine. 2HI(g) → I2(s) + H2(g) I2(s) → I2(g) ΔH⁰ = 124.8 kJ/mol I2(g) + H2(g) → 2HI(g) ΔH⁰ = - 73.0 kJ/mol2 HC= CH + 5 O2 > 4 co2 + 2 h2o What is the energy of the reaction and is it exo- or endothermic?
- For each reaction, write the chemical formulae of the oxidized reactants in the space provided. Write the chemical formulae of the reduced reactants in the space provided. reactants oxidized: 2Fe(s) + 3CuCl, (ag) → 2FEC1, (ag) + 3Cu(s) reactants reduced: reactants oxidized: Ca(s) = ZaCL (ag) – Za (s) + CaCl, (aq) reactants reduced: reactants oxidized: Feso,(ag) + Za (s) Fe(s) + ZnSo,(ag) reactants reduced:Cl2 + NaBr → NaCl + Br2If HCI is added to each of the following substances, which will produce CO2 gas? KBr СаСОз NaOH HC2H3O2 O O O O
- Calculate AH for the reaction CH4 (g) + NH3 (g) → HCN (g) + 3 H2 (g), given: N2 (g) + 3 H2 (g) → 2 NH3 (g) C (s) + 2 H2 (g) → CH4 (g) H2 (g) + 2 C (s) + N2 (g) → 2 HCN (g) AH = -91.8 kJ AH = -74.9 kJ AH = 270.3 k %3DPart 1 A student carried out an investigation to observe the effect of changing concentration of sulfuric acid on the breakdown of calcium carbonate (marble) chips. They changed the concentration of the acid between each test but kept the size of the marble chips constant. The full equation for the reaction and a graph of the overall results can be seen below. CaCO3(s) + H₂SO4(aq) → CaSO4(aq) + CO2(g) + H₂O (1) a) b) Rate of Reaction * Concentration of Acid (mol dm³) Explain, using collision theory, why the student obtained these results, and state what they could conclude about the effect of changing concentration of acid on the rate of reaction between calcium carbonate and sulfuric acid. If the student had ground up the calcium carbonate chips into a powder and run the tests again, what would you expect to happen to the rate of reaction? Briefly explain why by applying collision theory. Part 2 The student ran the same experiment, but this time changed the temperature, increasing it…Identify what type of chemical reaction this is: H2(g) + I2(s) ≈ 2Hl(g)