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25cm^3 of a solution of BaCl2 is placed in a beaker and Ba2+ ions quantitatively(completely) precipitated by boiling excess NaCO3 solution containing 0.0005moles. After filtration, the remaining NaCO3 solution needed 0.004moles of H Cl for neutralization. Calculate the number of moles of NaCO3 remaining after filtration., therefore deduce the number of moles of BaCl2 which reacted with the NaCO3 solution.
a 5.00 g chunk of potassium is dropped into 1.00 kg water at 24 deg c. what is the final temperature of the water after
How are excess sulfuric acid and the excess methanol removed from the crude ester after the reaction has been completed. Why was 5% NaHCO3 used in the extraction. What would happen if 5% NaOH had been used
If you have an organic layer that contains an organic acid, an organic base, and a nautral organic compound, what is in the organic layer after complete treatment with NaOH(aq), followed by complete treatment with HCl(aq)
In a certain process, 750. J of work is done on a system which gives off 195 J of heat. Calculate the total energy change (?U) for this process
What is the structure of the so-called Garner Aldehyde? Why is this compound a popular building block in the synthesis of more complex structures
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 -> NH4+(aq) + NO3(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4. (a) When ..
Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu. Calculate the binding energy
a sample of 36.0 mg of an organic compound that has molar mass 84.0 gmol is dissolved in 10.0 ml of h2o. solution is
If you weigh .25g of an antacid tablet that weighs 1.42g, what percentage of the tablet have you used? If the tablet contains 250 mg of CaCO3, what mass of CaCO3 do you have in your measured portion
What masses of sodium chloride,magnesium chloride, sodium sulfate,calcium sulfate, calcium chloride, potassium chloride, and sodium bicarbonate are needed to produce 1 L of arificial seawater
The Ka for hypochlorous acid (HClO) is 3.0 x 10?8. What is [OH?] in a 0.145 M solution of sodium hypochlorite (NaClO)
a 10.00-ml sample of sulfuric acid from an automobile battery requires 35.08 ml of 2.12 m sodium hydroxide solution for
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