Question

6. Calcium oxide reacts with nitric acid to produce calcium nitrate and water. How many grams of calcium oxide are required for complete reaction with 30.0 mL of 0.587 M nitric acid? The molar mass of calcium oxide is 56.077 g/mol. (Hint: start by writing the balanced equation for the reaction.) 7. A sample contains an unknown amount of succinic acid, H2CHO. If 0.3540 g of the sample requires 42.70 mL of 0.1000 M NaOH to neutralize the H2C,H404 completely, what is the percentage of H2C4H4O, in the sample? The molar mass of H2C4H40, is 118.09 g/mol. The balanced equation for the reaction is: H2C4H4o, + 2 NaOH → 2 H2O + Na:C4H4O4 8. Sodium thiosulfate, Na2S203, is an important reagent for titrations. Its solutions can be standardized by titrating the iodine released when a weighed amount of potassium hydrogen iodate, KHIO)2 gmol), is allowed to react with excess potassium iodide in acidic solutions. The net ionic equations a 389.912 production of iodine from KI 1(10):: titration of iodine: IO,-+ 5 1-+ 6 H+ → 312 + 3 H2O 12 +2 s2032 2 г + s4062- What is the molarity of a sodium thiosu fate solution if 44.76 mL. are required to titrate the iodine released from 0.1742 g of KH(IOs)2?

Answer 1

As the questions are too much so, I am solving the first two question which are 6 and 7. Apologies for the inconvenience.

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