1). A 22.536 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 72.516 g of water. A 11.800 g aliquot of this solution is then titrated with 0.1054 M HCl. It required 32.70 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous waste.
2).Constant-boiling HCl can be used as a primary standard for acid-base titrations. A 50.00 mL sample of constant-boiling HCl with a concentration of 0.1193 M was collected and titrated to an end point with 34.89 mL of Ba(OH)2 solution. What is the molarity of the Ba(OH)2 solution?
3).How many grams of primary standard grade sodium carbonate are necessary to prepare 2.00 L of a 0.0630 M Na2CO3 solution?
4). A standardized solution that is 0.0150 M in Na is necessary for a flame photometric determination of the element. How many grams of primary-standard-grade sodium carbonate are necessary to prepare 800.0 mL of this solution?