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Calculate the pH of a solution that has an ammonium chloride concentration of .05 M and a sodium acetate concentration of .045 M
Comment on the difference between the impure and crystallized sulfanilamide. What does the difference indicate about your ability to perform an effective crystallization
What is the ratio of the rate constants for this reaction when the temperature is decreased from °C to °C?
what volume of 420 ml of hydrogen occupy if the temperature is raised from 0 C to 95 C?
(a)how do I calculate the concentration of the lycopene solution in the spectrophotometer cell before isomerization, given that the molar absorptivity of lycopene at 471 nm is 1.86 x 10^4. (b) Calculate the mass of lycopene in 3.0mL of the solutio..
The resulting solution required 13.73 mL of 0.176 mol L-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass of Mg(OH)2 in the original sample [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a ch..
How did you deduce which spot corresponded to 2-naphthol on yourTLC plate that analyzed the reaction mixture at 10, 30, and 60 minutes. Did your TLC analysisindicate the presence of any 2-naphthol remaining atthe end of the 60-minute reaction time..
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 332 units was obtained for the intensity of the 671 nm red emission line.
A given compound has the following solubility properties. At room temperature, it is souble in diethyl ehter but insoluble in both ethanol and water At high temperatures,
What would be the freezing point for a 0.35m solution of sodium bromide in water? (Hoff factor = 1.75)
we will measure the rate of the following redox reaction: 6I + BrO3 +6H -> 3I2 +Br + 3H2O rate = 1/3 delta[I2]/delta t after 219 seconds When the reactants are mixed it is found that the molarity of the I2 has increased from 0M to 1.0 x 10-4M . a)..
How many kilojoules of heat is required to completely covert 70.0 grams of water at 66.0° C to steam at 100°C?
Calculate the pH of a solution prepared by diluting 2.5 mL of 1M acetic acid up to a final volume of 100 mL (pka 4.76)
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