Reference no: EM132560595

1) Citric acid, C6H8O7 , a component of jams, jellies, and fruity soft drinks, is prepared industrially via fermentation of sucrose by the mold Aspergillus niger. The equation representing this reaction is C12 H22 O11 + H2 O + 3O2 ? 2C6 H8 O7 + 4H2 O

2) The phosphorus pentoxide used to produce phosphoric acid for cola soft drinks is prepared by burning phosphorus in oxygen. (a) What is the limiting reactant when 0.200 mol of P4 and 0.200 mol of O2 react according to P4 + 5O2 ? P4 O10 (b) Calculate the percent yield if 10.0 g of P4O10 is isolated from the reaction

3) What volume of 0.0105-M HBr solution is required to titrate 125 mL of a 0.0100-M Ca(OH)2 solution? Ca(OH)2 (aq) + 2HBr(aq) ? CaBr2 (aq) + 2H2 O(l)

4) What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO3 requires 20.22 mL of the AgNO3 solution to reach the end point? AgNO3 (aq) + NaCl(aq) ? AgCl(s) + NaNO3 (aq)

5) Potatoes can be peeled commercially by soaking them in a 3-M to 6-M solution of sodium hydroxide, then removing the loosened skins by spraying them with water. Does a sodium hydroxide solution have a suitable concentration if titration of 12.00 mL of the solution requires 30.6 mL of 1.65 M HCI to reach the end point?