Pb2+ solutions: 0.1 M nitric acid (HNO3) in 50 mL DI water. How much concentrated HNO3 and DI water is needed? Dilute 1000 ppm (mg/L) Pb2+ standard solution to 10 ppm Pb2+ in 10 mL of 0.1 M HNO3. How much (volume) 1000 ppm Pb2+ standard and 0.1 M HNO3 is needed? Dilute 10 ppm Pb2+ in 0.1 M HNO2 to 0.015, 0.050, 0.100, and 0.150 ppm Pb2+ in 12 mL of the 0.2 M pH 4.6 acetate buffer. Make a table for how much 10 ppm Pb2+ and 0.1 M HNO, is needed. Pb2+ solutions: 0.1 M nitric acid (HNO3) in 50 mL DI water. How much concentrated HNO3 and Dl water is needed? Dilute 1000 ppm (mg/L) Pb2+ standard solution to 10 ppm Pb2+ in 10 mL of 0.1 M HNO3. How much (volume) 1000 ppm Pb2+ standard and 0.1 M HNO, is needed? Dilute 10 ppm Pb2+ in 0.1 M HNO2 to 0.015, 0.050, 0.100, and 0.150 ppm Pb2+ in 12 mL of the 0.2 M pH 4.6 acetate buffer. Make a table for how much 10 ppm Pb2+ and 0.1 M HNO3 is needed. 3