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Problems:
Calculate the pH of a buffer solution:
Containing 0.015 M acetic acid and 0.035 M sodium acetate.
The same solution as in part a) after enough HC l has been added to establish a Cl-concentration of 0.001 M.
Where: KA=1.8*10-5
For the carbonate system in pure water, what species dominates at the typical pH encountered in natural water sources?
A sample of water collected in the field had a pH of 6.8. By the time it was analyzed in the lab, the pH had decreased to 6.0. Give apossible explanation.
For a water sample with a bicarbonate ion concentration of 50 mg/L and a CO2 content of 30 mg/L:
Find the pH &
Find the pH if CO2 is reduced by aeration to only 3 mg/L.
Assignment NOTE: 1. All work is to be neat and legible. 2. Units are to be included in all calculations. 3. Late submissions will lose 25% per day. 4. Cover sheets containing the following information are to be used: - Your name. - The date of submission. - The course title and number. - The assignment number. 5. Place your responses only on the“right hand pages”of the submitted assignment. 6. You are responsible for the proper binding of your submissions.
What is the change in internal energy (in J) of a system that absorbs 0.535 kJ of heat from its surroundings and has 0.362 kcal of work done on it
Dr. Carvell made up a 5X stock of ONPG stock solution that has a concentration of 50 mN. The molecular mass of ONPG is 354.7. What is the percent composition of this solution
How Lanthanide contraction controls the atomic sizes of elements of 6th and 7th periods?
Calculate the volume of gas occupied by 0.840 moles of Nitrogen gas at a pressure of 1.37 atm and a temperature of 315 K. R = 0.0821L atm/mol K
Suppose we start with CO2 and H2, both at a concentration of 0.100 M. When the system reaches equilibrium, what are the concentrations of products and reactants?
Is the solubility of a cation predictable from the position of its element in the Periodic Table? Is precipitate color predictable from the position of the cations element in the Periodic Table?
determine the functional form of phit and the frequency of a pendulum bob whose mass is m and is attached to a massess
1.indicate the solubility of the following solutes in 100 g of watera.potassium chlorate at 90 degcb.potassium nitrate
The highest possible oxidation state for halogens is +7 and the lowest possible is -1. Which of the following could not disproportionate?
Question- Calculate the pH of a solution made by mixing equal volumes of a solution of NaOH with a pH of 11.40 and a solution of KOH with a pH of 10.30. Assume the volumes are additive.
A 5.13g sample of a solid containing Ni is dissolved in 20.0mL water. A 5.00mL aliquot of this solution is diluted to 100.0mL and analyzed in the lab. The solution was find out to contain 5.09 ppm Ni. Find the molarity of Ni in the 20.0mL solution..
Alkanes are relatively inert except for two reactions, combustion and radical halogenations. Show all the products, intermediates and the flow of electrons in the following reaction.
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