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Hard water often contains dissolved Ca2+ and Mg2+ ions. One way to soften water is to add phosphates. The phosphate ion forms insoluble precipitates with calcium and magnesium ions, removing them from solution. Suppose that a solution is 5.0×10-2 M in calcium chloride and 8.0×10-2 M in magnesium nitrate.What mass of sodium phosphate would have to be added to 2.0 L of this solution to completely eliminate the hard water ions? Assume complete reaction.
Calculate the pH at each point indicated in the titration of 100.00 mL of 0.0755 M NaClO2 with 0.0412 M HCl.
Complete and balance the following equation Write the ionic equation and net ionic equation. Indicate spectator ions and determine if a precipatie would form. (NH4)2C03(aq)+CaCl2
How many outer atoms and lone pairs are present in a molecule with a see-saw geometry
calculate the detection limit of this reaction for each halide, the value below which there will be no observed reaction.
Draw the reaction scheme (with arrows) of the Diels Alder rxn between maleic anhydride and furan. draw both the endo and exo adducts
assume standard biological conditions and that all the enzymes are present to catalyze the reactions . the following are sequential enzyme reactions in a pathway
prepared in good yield as the exclusive product of hydration of an alkyne with water, SO4 and Hg to form ketone
determine the molarity of each of the ions present in the following aqueous salt solutions.
How would excess solvent affect the melting point. How will impurities affect the melting point.
Many gases are shipped in high-pressure containers. Consider a steel tank whose volume is 65.0 {\rm L} and which contains {\rm O_2} gas at a pressure of 16500 {\rm kPa} at 23^\circ C.
Lactic acid has one acidic hydrogen atom in its structure. A 0.10 M solution of lactic acid has a pH of 2.44. Calculate the Ka of lactic acid.
When a mixture of 12.5g of acetylene (C2H2) and 12.5g of oxygen (O2) is ignited, the resultant combustion reaction produces CO2 and H2O
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