Other Chemistry Answers

There are two forms of glucose, designated alpha (a) and beta (b), which are in equilibrium in aqueous solution. The equilibrium constant for the reaction is 1.5 at 30°C.


a-D-glucose(aq) <=> b-D-glucose(aq) K=1.5


(a) If you begin with a fresh 1.0 M solution of a-D-glucose in water, what will be its concentration when equilibrium is reached?


(b) Calculate the percentage of a-glucose and of b-glucose present at equilibrium in aqueous solution at 30°C.

For the reaction A + B  C, the rate constant at 215 oC is 5.0 x 10-3 and the rate constant at 452o C is 1.2 x 10-1.

3



(a) What is the activation energy in kJ/mol? (b) What is the rate constant at 100o C.

A buffered solution contains 0.25 M NH3 (Kb = 1.8 x 10-5) and 0.40 M NH4Cl. a. Calculate the pH of this solution. b. Calculate the pH of the solution that results when 0.10 mole of gaseous HCl is added to 1.0 L of the buffered solution from part a.

The autoionization of sulfuric acid can be described by the following chemical equation: H2SO4 (l) + H2SO4 (l) ⇌ H3SO4+(aq) + HSO4− (aq) At 25°C, K = 3 × 10−4. a. Write an equilibrium constant expression for K H2SO4 that is analogous to Kw.



Given that the density of H2SO4 is 1.8 g/cm3 at 25°C. b. What is the concentration of H3SO4+ ? c. What fraction of H2SO4 is ionized?

Describe the ways of classifying amino acids and give example of each class

If you used 61.5mL of 3.80 M KOH to titrate 15.0 ML of H2SO4, what was the concentration of the H2SO4?.

How many liters of ammonia gas is generated with 4.50 L of nitrogen gas and excess hydrogen gas?

What is the maximum mass of

S

8

that can be produced by combining

75.0

g

of each reactant?


8

SO

2

+

16

H

2

S

⟶

3

S

8

+

16

H

2

O

Why iis balanced chemical equation needed in solving stoichiometric calculation?

Give the statementss of Zeroth,First, second and third laws of thermodynamics and outline their significant