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Question- What is the pH change of a 0.300M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.155M with no change in volume?
Please answer only if you are 100% confident
Calculate the energy in joules and calories lost when 10.0 gm ethanol, {C_2H_5OH}, cools from 62.5 0C to -46.0 0C?
Complete and balance an equation describing each of the above reactions. (Use the lowest possible coefficients. Omit states-of-matter in your answer.)
500ml Buffer solution is 0.250 M in HNO2 as well as 0.200 M in KNO2. The Ka for HNO2 is 4.6x10-4. Explain what is the initial pH of this buffer
a 500 gram sample of aluminum pellets specific heat capacity 0.89 jdegrees c x grams 10 gram sample of iron pellets
How would the process of photosynthesis be affected, and in what steps, if light, CO2 concentration, and/or temperature were altered during photosynthesis
What volume in liters of O2(g) is required to form 46 L of CO2(g)? Assume both gases are measured under the same conditions.
What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.10 M buffer solution at pH 5.0. Enter your answer to two significant figures.
solid aluminum reacts according to the balanced equation. if a total of 830 kj of heat is produced in the reaction as
40ml of solution that was saturated with calcium oxalate required 1.76 ml of .00101 M permanganate to titrate it. what is the ksp value for calcium oxalate
Copper (II) oxide can be reduced to copper metal by heating in a stream of hydrogen gas:CuO(s) +H2(g) -heat--> Cu(s) +H2O(g)
Presuming the same molar amounts of Al Mg and Ca were used in this experiment for which would there be more H2 gas evolution. For which would more HCl stay put in the reaction flask after the reaction
RNA is readily hydrolyzed by alkali, whereas DNA is not. Why. Think of pH required for nucleophile generation
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