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A solution contains 0.200 moles of HCOOH and 0.100 moles of HCOONa in a 200 mL volume is found to have a pH of 3.44. What is the Ka of HCOOH?
A 0.50 sample of compound contains 0.40g of Carbon and .10g of Hydrogen. What is the empirical formula
A student weighed 0.0961 g of calcium carbonate (FW: 100.08 g/mol) into a 100-mL volumetric flask, dissolved the powder using nitric acid, and diluted to the mark with 0.2% nitric acid.
caffeine is about 10 times as soluble in hot water as in cold water, a chemist puts hot water extract of caffeine in to an ice bath and some crystallizes. is the remaining solution saturated unsaturated or supersaturated and why?
State the chemical reaction that took place in the patient's body.
C5H5N, and 0.350 moles/l in pyridinium chloride, C5H5NHCl you are given a kb value of 1.7 x 10^-4 for pyridine find the ph of this solution using this kb value
A fluoridated water supply contains F- at a concentration of 8.9 ppm. What is the maximum concentration of Mg2+ that can exist in this water supply without causing precipitation.
what is the density of hydrogen sulfide at 1.4 atm and 340
0.4 grams sample of primary standard Na2CO3 treated with 45mL of dilute perchloric acid. Solution boiled to remove CO2 and then the excess HClO4 back titrated with 13mL of dilute NaOH
How many kilograms of NH3 will be produced when 25.0 kg of CaCN2 react with excess water?
You are allowed to treat the washed precipitate with one more reagent. By observing what happens when this one reagent is added you should be able to decide, within seconds, what cation is present in your unknown. What one reagent is added
1.0678g of a standard iron(ii) ammonium sulfate, (NH4)2Fe(SO4)2. 6H202 requires 35.50mL of permanganate solution for titration. calculate the molary of the permanganate solution.
When using paper chromatography to separate components of a mixture, the manual suggests that water is wicked through the paper.
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