original solution? Write net ionic equations for the formation of each of the precipitates observed. 3. You want to analyze a cadmium nitrate solution. What mass of NaOH is needed to precipitate the Cd2+ions from 35.0 mL of 0.500 M Cd(NO3)2solution? 4. Toxic chromate can be precipitated from an aqueous solution by bubbling SO2gas through the solution. How many grams of SO2are required to treat 3.0*108L of 0.050 mM CrO42-?
5. Toxic cyanide ions can be removed from wastewater by adding hypochlorite: 2CN−(aq)+5OCl−(aq)+H2O(l)→N2(g)+2HCO3−(aq)+5Cl−(aq)How many liters of 0.125 M OCl-solution are required to remove CN-in 3.4*106L wastewater in which the concentration is 0.58 mg/L? 6. To determine the concentration of SO42-ion in a sample of groundwater, 100 mL of the sample is treated with 0.0250 M Ba(NO3)2, forming insoluble
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- Summer '08