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1. Calculate the pH value of a solution having a concentration of H+(hydrogen ion) of 5.35E-09 M at 25°C ? (Include 2 decimal points).
pH =??
2. The pKa of the ammonium ion is 9.25. NH3/NH4+ is a good buffer:
a. Between pH 10.25 and 11.25.
b. Between pH 7.25 and 8.25.
c. At pH values less than 7.0.
d. At pH 4.63.
e. Between pH 8.25 and 10.25.
Write a net ionic equation for the neutralization reaction of CH3CO2H(aq) with CsOH(aq). 2. Which of the following compounds is an Arrhenius base in water?
Sodium reacts with flourine to produce sodium flouride. If 4.0 grams of sodium reacts with 5.0 grams of flourine, how much NaF can be produced?
Assuming that the helium behaves like an ideal gas with constant heat capacities, show that the final temperature of the helium in the bottle is ,ϒTo.
If you want to prepare a buffer with a pH of 4.30 with HOAc (acetic acid) and NaOac, what ration of NaOAc/HoAc should you use? (pKa of HOAc is 4.74)
How many phases does carbon have? Carbon, like many elements or molecules has several solid phases. What are they?
How much ammonia in a lab at 22 degree celcius would be necessary to make 1.0 g of urea if the yield is know to be less than 57%
Calculate the wavelength of light emitted from a hydrogen atom when it undergoes a transition from the n=6 level to n=3.
Question- Talk about the impact that the tonnage of sulfur or sulfuric acid recovered from SO2 in flue gas treatment would have upon the chemical industry if all coal- and oil-fired were needed to use such treatment processes.
Calculate the cell potential for the following reaction as written at 75 °C, given that [Zn2 ] = 0.870 M and [Ni2 ] = 0.0130 M. The standard cell potential for the half reaction of Zn is 0.76 written as Zn (s) --> Zn2+ + 2e-
For the reaction, Hg(aq) + 4I(aq) ? HgI4(aq), the overall formation constant of HgI4 is 1.0 x 10^30. What is the equilibrium concentration of Hg in 500.0 mL of a solution that was initially 0.01 M Hg after the addition of 65 g of KI (FW =166.0 g m..
AIBN as initiator, was found to have Mn average = 1000 kg mol-1 and a radioactivity of 6 x 103counts s-1 g-1 (measured using a liquid- cintillation counter). Given that the AIBN has a radioactivity of 6 x 109 counts s-1 mol-1, determine the mode of t..
A second-order reaction required 53.8s for the concentration to drop from 0.50 M to 0.36 M. What is the value of the rate constant
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