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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).
Calculate the theoretical yield of C2H5Cl when 124 g of C2H6 reacts with 219 g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H6Cl and HCl.
Ethanol (C2H5OH) is produced from the fermentation of sucrose in the presence of enzymes. C12H22O11(aq) + H2O(g) > 4 C2H5OH(l) + 4 CO2(g)
A sample of 1.42 g of Helium and an unweighed quantity of Oxygen are mixed in a flask at room temperature. The partial pressure of Helium is 42.5 torr and of oxygen is 158 torr.
You need to make an aqueous solution of 0.191 M zinc sulfate for an experiment in lab, using a 125 mL volumetric flask. How much solid zinc sulfate should you add
In what region of the electromagnetic spectrum wil the electron transitions from a higher energy state to n1=3 appear for the hydrogen spectrum?
Rate constants for the decomposition of acetaldehyde were measured at five different temperatures. A plot of ln k versus 1/t gave a slope of -2.09*10^4 K. What is the activation Energy for this reaction
Magnesium phosphate precipitates from an aqueous solution. Does the entropy of the system increase or decrease
Determine how much heat (in kJ) is needed to warm 12.0g of ice, that is initially at -10.0 ° C, to steam at 114.0 ° C? The heat capacity of ice is 2.09 J/g⋅ ° C and that of steam is 2.01 J/g⋅ ° C.
To obtain the same antifreeze protection requires 76 g of propylene glycol to replace each 62 g of ethylene glycol. Calculate the mass of propylene glycol required to replace
Question : Explain and show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.
Identify the cation and anion. Express the answer in terms of the formula of the salt. A green powder dissolves in water and gives a pure white precipitate with acidic AgNO3. When the solution is heated with H2O2 and NaOH, it turns a yellow color,..
What is the pH of a solution made by adding 10.5 grams of sodium acetate, CH3COONa to 400 mL of 0.180 M hydrochloric acid.
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