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- 0.2640 g of sodium oxalate (FW. 134.00 g/mol ) is dissolved in a flask and requires 30.74 mL of potassium permanganate (from a buret) to titrate it and cause it to turn pink (the end point). The equation for this reaction is: 5Na 20 20 4(aq) + 2KMNO 4(aq) + 8H 2SO 4(aq) ---> 2MNSO 4(aq) + K 2SO 4(aq) + 5Na 2SO 4(aq) + 10CO 2(g) + 8H 20(8) What is the molarity of the potassium permanganate?Balance the following chemical equation (if necessary): NaOH(aq)+H₂SO₄(aq)→H₂O(l)+Na₂SO₄(aq)3. Write the products of the reaction between the acid KHP and the base NaOH, and balance the reaction: HKC3H4O4(s) + NaOH(aq) –
- We want to determine the acetylsalicyclic acid content of a series of aspirin tablets by titration with NaOH(aq). Each of the tablets is expected to contain about 0.32 g of HC9H7O4. What molarity of NaOH(aq) should we use for titration volumes of about 23 mL? HC9H7O4(aq) + OH-(aq) C9H7O4-(aq) + H2O(l)In an analysis of metal carbonate M2CO3∙3H2O, 1.500g of the unknown carbonate was dissolved in enough water to make a 100.0mL solution. 20.00mL of such solution was treated with 10.00mL of 1.000M HCl solution, and the excess acid was titrated with 54.92mL of 0.1138M NaOH solution. The equations are given below: CO32-(aq) + 2 H+(aq) → H2O(l) + CO2(g) H+(aq) + OH-(aq) → H2O(l) a) the moles of NaOH used in the titration is (enter the answer in 4 sig. figs.) Answer mol b) the mole of HCl reacted with the carbonate is (enter the answer in 4 sig. figs.) Answer mol c) the molar mass of M2CO3∙3H2O is (enter the answer in 4 sig. figs.) Answer g/mol d) the identity of metal M is (enter the element symbol) AnswerCalculate the free energy change, AG°, for the following reaction, in kJ/mol. Report your answer to the ones place. 4Ag(s) + O2(g) + 4H*(aq)→ 4Ag*(aq) + 2H20(1I)
- A 0.2088 g sample of primary-standard-grade sodium carbonate, Na₂CO₃ (105.99 g/mol) was dissolved in water and diluted to 100.00 mL in a volumetric flask. A 30.00-mL portion of this solution was used to standardize a hydrochloric acid (HCl) solution based on the following reaction: CO₃²⁻ + 2H⁺ → H₂O + CO₂. If 36.09 mL of the HCl solution was used to reach the end point, what is the molarity of the HCl?KO2(s) + H2O(l) → KOH(aq)+ O2 (g) + H2O2 (aq) balance the equationFind the net ionic equation for 2Al(s) + 3CuCl2·2H2O(aq) -> 3Cu(s) + 2AlCl3(aq) + 6H2O(l). Explain why any ions are cancelled as spectators.
- The following chemical reaction takes place in aqueous solution: 2AgNO3 (aq) + NH42S (aq) → Ag2S (s) + 2NH4NO3 (aq)Write the net ionic equation for this reaction.1. a) Write the formula for the conjugate base of HPO4^-2 b) Write the formula for the conjugate acid of NH3The following chemical reaction takes place in aqueous solution: FeSO4(aq) + (NH4) S(aq) → FeS(s)+(NH4)₂SO4(aq) 2 Write the net ionic equation for this reaction.
