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"Hard" water is hard because it contains Ca2+(aq) and Mg2+(aq) ions. It can be softened by adding borax powder, which is sodium tetraborate, Na2B4O7. Adding borax removes the Ca2+(aq) and Mg2+(aq) from solution. Write a net ionic equation for each of these two reactions. What ion replaces the Ca2+(aq) and Mg2+(aq) ions in the water?
given that the solubility of o2 in water at 0 degrees c is 14.7ppm calculatenbspa the concentration of dissolved o2 in
iron(111)oxcide is formed when iron cobines with oxygen in the air. how many grams if Fe2O3 are formed when 16.7 Fe reacts completly with oxygen?
Nitrating Acetanilide- draw the resonance forms for the arenium ion formed during your reaction (nitroacetanilide)
the pressure of the vapor in this experment when the flask was full of vapor was assumed to be equal to the pressure of the atmosphere in the laboratory. why is this assumption valid
What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.988 atm?
How many electrons could occupy a subshell with the following quantum numbers? A) n=2, l=1 B) n=3, l=1, ml= -1
A sample of 45.0 mg a perfect gas fills a volume of 320.0 cm^3 at a pressure of 256Torr and at a temperature of 298 K. Determine the molar mass of such a gas based on the above data and assuming perfect gas behavior.
Calculate the pH of a solution prepared by mixing 0.0800 mol of chloroacetic acid plus 0.0400 mol of sodium chloroacetate in 1.04 L of water. (pKa of chloroacetic acid = 2.865.)
Usually as a solution cools, the solvent will crystallize out of the solution as the pure solvent. What effect will this have on concentration of the solute as solvent is solidifying.
Explain how microorganisms can be used to produce electricity (bacterial fuel cells). Explain why you feel pain when you bite down
Why is this important and if this step was not done, how could this change your results (in other words what specifically would happen to the Ksp value?
Determine which elements are being oxidized and which elements are being reduced in each reaction
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