A supply of NaOH contains the contaminants NaCl and MgCl2. A 4.9995g sample of this material is dissolved and diluted to 500mL, 20mL of this is titrated with 22.26mL of a 0.1989M solution of HCl. What is the percent NaOH of the original solution?
22.26 ml of 0.1989M HCl contain
4.9995 g of crude material contain 4.4275 g of NaOH, therefore