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Explain how many grams of dry NH4Cl require to be added to 2.10L of a 0.700M solution of ammonia NH3, to make a buffer solution that has a pH of 8.95? Kb for ammonia is 1.8×105
State whether sulfuric acid is a strong or weak acid and write a fully balanced chemical equation for the dissociation of sulfuric acid in aqueous solution. Hence calculate the pH of a 2.2 x 1-^-3 mol dm^-3 aqueous solution of sulfuric acid.
If a single pill contains 0.150 grams of KCN How much HCl in grams would be necessary to consume all of the KCN
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.538 grams of iron and 13.0 mL of 0.40M copper(II) sulfate react to form as much product as possible.
In the laboratory, a student named Georgia weighed 4.75 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand. She added 15mL of acetone to her sample. Which component of the mixture is dissolved in the acetone?
Depict the major, neutral organic product obtained if a) the reaction proceeds by the SN1 mechanism b) the reaction proceeds by the SN2 mechanism.
What is the pH of a solution that has a formic acid (HCHO2) concentration of 0.39 and a potassium formate (KCHO2) concentration of 0.12? The Ka for formic acid is 1.7 x 10-4.
A 12-ppm solution of lead gives an atomic absorption signal of 8.0% absorption. What is the atomic absorption sensitivity
CO(g)+Cl2----COCl2(g) Kc=255 at 1000 K If the reaction mixture contains a CO concentration of 0.1500 M and a Cl2 concentration of 0.175 M at 1000K. What are the concetnrations of each substance when equilibrium is reached
Define the term "standard solution" and discuss what is meant by "standardizing a solution". For clarification, as an example
Draw the Skeletal structure of (2R,3R)-dibromosuccinic acid ((2R,3R)-2,3-dibromobutanedioic acid) (show one wedge bond, one dashed bond, and two sticks attached to the chiral carbon.
Ferrocene cannot be nitrated using the conventional HNO3-H2SO4 mixed acid conditions, even though nitration is an electrrophilic aromatic substitution reaction. Explain.
What is the pH of 0.346 M diethylammonium bromide, (C2H5)2NH2Br. The Kb of diethylamine, (C2H5)2NH, is 6.9 x 10-4
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