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When you mix 10.0ml of ascorbic acid standard solution in the flask with 25ml water, 2ml of 6M acetic acid solution and 1ml of starch solution, it is necessary to know the exact final volume of this solution to get an accurate determination of ascorbic acid in the titrations of test solutions? Explain. Hint: Do the volumes of water, acetic acid and starch solutions enter into the calculations to determine the amount of ascorbic acid? Does the volume of ascorbic acid solution added before titration influence how much iodine solution will be needed?Thank you.
If it takes 526 J of energy to warm 7.40g of water by 17°C, how much energy would be needed to warm 7.40g of water by 55°C
Calcium carbide, CaC2 reacts with water to form acetylene. CaC2(s)+2H2O(l) ==> C2H2(g)+ Ca(OH)2(s)
Find the mass of a reactant using Dalton's law of partial pressures, ideal gas law, and stoichiometry - Determine the amount of zinc metal in grams consumed in the reaction.(Vapor pressure of water at 25 o C-23.8mmHg)
Henry's law predicts a simple relationship between solubility and pressure. If the solubility of oxygen gas
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)
An electron traveling at the velocity of 3.7 105 m/sec has an uncertainty in its velocity of 2.34 105 m/s. determine the uncertainty in its position?
What are the mole fractions of ethanol and water in a solution prepared by mixing 55 mL of ethanol with 45 mL of water at 25 degrees celsius
A lab protocol on synthesizing sulfathiazole from p-acetamidobenzenesulfonyl chloride and 2-aminothiazole. It would be appreciated if exact amounts of reagents, solvents, etc (in grams, mmols, mls - etc), could be given.
4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 5.86 moles of CO2 react completely?
A 4.60 g nugget of pure gold absorbed 288 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C? The specific heat of gold is 0.129 J/(g·°C).
Calculate the surface tension from 0.028M soap solution at 293K. If the surface tension of 0.056M soap solution is 0.0433Joule per kelvin square. Surface tension of pure water is 0.0728 joule per meter square.
a solution is prepared by dissolving 23.7g of CaCl2 in 375g of water. The density of the resulting solution is 1.05g/mL.
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