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25.0 mL of a hydrofluoric acid solution of unknown concentration is titrated with 0.200 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 3.00. What was the concentration of the original hydrofluoric acid solution. (Ka(HF) = 7.1 x 10-4)
Rank the following titrations in order of increasing pH at the equivalence point of the titration (1 = lowest pH and 5 = highest pH).
At what pH is the weak base, pyridine, dissociated by 5%? Pyridine + H2O Pyridium cation + OH- Kb = 1.71*10 ^-9 A. pH = 5.5 B. pH = 6.5 C. pH = 7.5 D. pH = 8.8 E. pH = 10.1
what purpose does the addition of bromine serve in the procedure described for the isomerization of dimethyl maleate
a. Provide equation for the complete combustion of ethylbenzene. b. Provide an equation for the partial combustion of acetylene. c. If 100 kg o both material where available, which hydrocarbon (ethylbenzene or acetylene) would produce the most wat..
a)Calculate the theoretical yield of when 109g of C2H6 reacts with 228g Cl2 of , assuming that and react only to form C2H5Cl and HCl .
Li2S is pictured n the text on .553. The length of the unit cel i 5.88 x 10^2 pm. For this structure determine: the coordination numbers of Li + and S2-
Through a valve, 7.0g of nitrogen gas is added to the bottle with balloon discussed in b). The temperature and external pressure are constant. Calculate the partial pressure of nitrogen.
Given the unbalanced equation, Cr(NO3)3(aq) + LiOH(aq) LiNO3(aq) + Cr(OH)3(s), how many grams of Cr(OH)3 are produced from 0.084 g of Cr(NO3)3?
a piece of matal with a specific heat capacity of 0.225 jg degrees c changes in temperature from 21.0 degrees c tp 51.0
calculate the percentage by weight of oxygen in the product formed when a 2.60-g sample of selenium combines with
Calculate the amount of heat transferred when 46.0 g of CH3OH is decomposed by this reaction at constant pressure.
60.0 mL portion of of 1.70 M solution is diluted to a volume of 288 mili litres. A 144-mili litres portion of that solution is diluted using 115 mLili litres of H2O. Determine the final concentration.
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