Reference no: EM13844042

1.) How many milliliters of 70 percent (w/w) HClO₄ must you dilute with water to prepare a total volume of 100.0 mL of 2.00 M HClO₄? The specific gravity of the concentrated solution is 1.6.

2.)An analyst is to determine the molarity of a NaOH solution. Three aliquots of standard KHP are weighed out: 0.3174 g, 0.4949 g, and 0.3869 g. These three aliquots were titrated using a NaOH solution and required 15.34 mL, 24.23 mL, and 18.59 mL, respectively. From these data calculate the average molarity of the NaOH solution.

3.) A second analyst was attempting to determine the percent KHP in an unknown sample, similar to that in the CEM 262 laboratory experiment 1. The analyst found the molarity of the standardized NaOH solution to be 0.0998 mol/L. Three aliquots of the unknown sample having weights of 0.8172 g, 0.9379 g, and 0.8740 g were titrated with the NaOH solution requiring 17.45 mL, 22.45 mL, and 23.67 mL, respectively. From these data, determine the average percent KHP in the unknown sample.