CHEM 24112 Chapter Notes - Chapter 15: Volumetric Flask, Reagent, Sodium Chloride

A student removes 25.00 mL of a 14.8 M NH_3 stock solution using a volumetric pipet. This volume of concentrated NH_3 was added to a 100-mL volumetric flask and diluted to the mark with water. Determine the moles of NH_3 in both the concentrated NH_3 in the pipet and in the 100.00 mL of dilute NH_3 solution. Moles of NH_3 (in pipet): Moles of NH_3 (in dilute solution):

b) Five liters of a 0.8 M solution of H,SO Calculate the grams of solute in the following solutions (grams of solute per 100 mL of solution-96) a) 17. 500 mL of 3% Ni Br2 b) 850 mL of 0.9% NaCl 18. Concentrated HNO, has a molarity of about 16 M. If you add 500 mL of water to 100 mL of concentrated HNO,, át is the molarity of the final solution? 19. You need 250 ml of 6.0 M NaOH solution and you have a 10 M stock solution. What volume will you need for this solution? 20. What is the only type of chemical reaction that will produce a precipitate? 21. What symbol do we write next to soluble products? What symbol do we write next to insoluble products?