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As a technician in a large pharmaceutical research firm, you need to produce 150 mL of 1.00 M potassium phosphate solution of pH = 7.10. The pKa of H2PO4^- is 7.21. You have 2.00 L KH2PO4 of 1.00 M solution and 1.50 L K2HPO4 of 1.00 M solution, as well as a carboy of pure distilled H2O . How much 1.00 M KH2PO4 will you need to make this solution?
what is the pH after the addition of 2.7*10-2 moles of KOH to 3.6*10-2 moles HCl if the resulting solution volume is 150mL
Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 6.00×10?3M ? The pKa of acetic acid is 4.76.
The rate constant for a certain chemical reaction is. 0.0125 L mol^-1 s^-1 at 25 degree Celsius and 0.0125 L mol^-1 s^-1 at 50.0 Celsius. What is the activation energy for the reaction, expressed in kJ mol^-1
What is the half-life? b) How long would it take for the concentration of CH3CN to decrease to 25% of its initial value? c) To 12.5% of its initial value?
A modern sample gives 920 disintergrations/h. Estimate the age of the Scrolls from these data
When the concentrations of CH3Br and NaOH are both 0.165 M, the rate of the reaction is 0.0050 M/s. What is the rate of the reaction if the concentrations of CH3Br and NaOH are both increased by a factor of four
Write a balanced equation for the reaction between O2 and H2. ( I know its H2O but I want to make sure there is nothing left over from O2)
When 83.6 joules of heat is added to 2 grams of water at 10 degrees Celsius, the temperature of the water increases to what value?
What is the heat change of H 2 O If the final temperature of the mixture = 25 degree celsius?
Compare the pH vs volume curve for HCL and acetic acid. discuss any difference in the shape of the curves. Compare theese two curves to one of the curves prepared for the unknow
If the emitted green light corresponds to an electron dropping from that excited state back down to the ground state, what is the energy spacing (in aJ) between the highest occupied and lowest unoccupied orbitals. The element used is Thallium.
Find the volume in cubic centimeters of a box 25 mm x 12 cm x 0.20 m. How many grams of water should the box hold. The density of water is 1 g/mL and 1 cubic centimeter equals 1 mL.
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