To standardize a solution of naoh before using it in a titration of an unknown acid, you dissolve 2.48 grams of potassium hydrogen phthalate (khp) into 100 ml of h2o. you then titrate the khp with your sodium hydroxide solution and reach the endpoint after adding 20.4 ml of naoh. what is the molarity of your sodium hydroxide solution?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)