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The NaOH catalyst solution is prepared by dissolving 0.4 g of NaOH in 4.0 mL of water then adding 3.0 mL of 95% ethanol. how many moles of NaOH, mL of water and ml of ethanol in 3 mL?
A 10.00 ml sample of vinegar, density 1.01 g/ml was diluted to 100.00 ml volume. It waas found that 25.0 ml of the diluted vinegar required 24.15 ml of 0.0976 M NaOH to neutralize it
A vinegar sample contained 5.20 % acetic acid. How may mL of 0.450 N sodium hydroxide would be required to titrate 25.00 mL of the vinegar sample
A solution is prepared by dissolving 13.4 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 12.00 mL sample of this stock solution is added to 57.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
A buffer that contains 0.55 M base, B, and 0.30 M of its conjugate acid, BH+, has a pH of 8.94. What is the pH after 0.0020 mol HCl is added to 0.25 L of this solution.
An aqueous CaCl2 solution has a vapor pressure of 82.1 mmhg at 50 C . The vapor pressure of pure water at this temperature is 92.6 mmhg What is the concentration of in mass percent?
a solution contains 4.00g NaOH, 5.61g KOH, and 1.03g RbOH in 90.0g of H2O. The solution has density of 1.08g/mL. What is the molality of OH?
Water and toluene are very good recrystallization solvents. Why is it not useful to use these solvents for a ‘quick' recrystallization?
Calculate the freezing point and boiling point of the solution. Kf benzene = 5.12 C/m Kb = 2.53 C/m
nickel acetate in a volumetric flask and add water to a total volume of 375 mL What is the concentration of the nickel cation? What is the concentration of the acetate anion?
An exothermic reaction liberates 7.58 kJ of heat in a coffee cup calorimeter containing 157 grams of solution. The temperature of the solution in the calorimeter increases by 11.2°C. How much heat was absorbed by the calorimeter? Assume the specif..
The active catalyst in this experiment was generated from the redox reaction of chloroplatinic acid with sodium borohydride. What is the active catalyst?
What is the ground state electron configuration for the boron atom? What term symbols can arise from this electron configuration?
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