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Ascorbic acid (vitamin C) is a diprotic acid of molecular weight176 g/mol. A sample of a vitamin supplement was analyzed bytitrating a 0.100 g sample dissolved in water with 0.020 M NaOH. A volume of 15.2 mL of the base was required to completely neutralizethe ascorbic acid. What was the mass percent of ascorbic acid in the sample?
At room temperature (25°C), 45 mL of a 0.002 M acid solutionreacts with 30 mL of a NaOH (aq) solution (pH = 11.95), determine (through calculations) whether the acid is phosphoric acid (H3PO4),acetic acid (CH3COOH), or carbonic acid (H2CO3).
For the first-order reaction below, the initial concentration of A is 0.240 M. If the concentration of A decreases to 0.0800 M after 21.8 hours, what is the half-life of the reaction
calculate the molarity and the molality of an nh3 solution made up of 27.5 g of nh3 in 70.0 g of water. the density of
Briefly discuss how the solubility, crystallization and extraction techniques aid one in separation of the components of "Panacetin".
pH will be greater than 7 at the equivalence point. C. titration will require more moles of base than acid to reach the equivalence point. D. pH will be equal to 7 at the equivalence point. E. titration will require more moles of acid than base to..
to reach equilibrium (at pH 7.00) through titration by adding 14.25 mL of 0.2030 M NaOH to 20 mL of this solution. What is the Molarity of the acid?
The isolated (S)-(-)-enantiomer was distilled in vacuum to give 1.5 g of pure amine. Calculate the yield of (S)-(-)-alpha-methylbenzylamine.
Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction
How EXACTLY is chromatography used in testing blood for drugs/alcohol? I need the exact process of how they do it, and why.
HNO3 by mass and has a density of 1.047 g/mL. What is the pH?
A gaseous oxide of nitrogen has an empirical formula of NO2. A 0.556 g sample of this gas in a 250. mL container at 24ºC exerts a pressure of 44.8 cm Hg. What is the molecular weight of the gas? What is the molecular formula of the gas
What volume of hydrogen gas at STP is required for the complete reaction of 50.0 g of nitrogen in the following reaction? N2(g) + 3 H2(g) ? 2 NH3(g)
Is the energy that an electron has in the first energy level of atom A the same as the energy that an electron would have in the first energy level of aom B
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