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The pKa of aspirin (acetyl salicylic acid) is about 3 while the pH of stomach acid is about 1.0 Circle the approximate proportion of ionized (deprotonated and charged for acid) to unionized (protonated and uncharged for acid) aspirin that would occur in the stomach.
10000:1 1000:1 100:1 10:1 1:1 1:10 1:100 1:1000 1:10000
By how many volts will the potential of an ideal Mg+2 ion selective electrode change if the electrode is removed from a 1 x 10-4 M MgCl2 solution and replaced with a 1 x 10-2 M MgCl2 solution
Joseph Priestley prepared oxygen by heating mercury(II) oxide. The compound HgO is stable at room temperature but decomposes into its elements (Hg and O2) at high temperatures. What conclusions can be drawn concerning DH and DS for this decomposit..
A certain technique is known to have a mean of 0.500 and standard deviation of 1.84*10^-3. itis also known that Gaussian statistics apply. How many replicate determinations are necessary if the standard error of the mean is not to exceed 0.100%
A .sodium iodate and calcium nitrate B. sodium nitrate and potassium hydroxide C. sodium iodate and iron (III) chloride D. sodium iodate and potassium hydroxide.
If a piece of Calcite (Calcium Carbonate) is put into the lake, would it tend to dissolve? Calcium carbonate solubility is 10^-8.35 M2, and the measured concentration of calcium ion is 0.1mM (millimolar)
The percent transmittance, %T, reading on a Spectronic 20 for a certain solution is found to be 45%. Calculate the absorbance for the solution
considering the given equation c3h8g 5o2g 3co2g 4h2og in which propane and oxygen reacts compute the volume of co2
Compare the results of your calculations from 2 and 4 above with the actual molarity of the Ba(OH)2 solution. Which method of analysis, equivalence point or gravimetric determination, was more accurate in your experiment. Why
what is the partial pressure of hydrogen gas in a mixture of hydrogen and helium if the total pressure is 588 mm hg and
in the laboratory a student named georgia weighed 5.95 g of an unknown solid mixture containing benzoic acid copper ii
What is the enthalpy change for each of the following reactions- 1. Ag+ (aq) + Li(s) -->Ag(s) +Li+(aq) 2. Fe(s) + 2Na+(aq) --> Fe2+(aq) + 2Na(s) 3. 2K(s) + 2H2O(l) --> 2KOH(aq) + H2(g)
An unknown noble gas effuses through a tiny hole into an evacuated space with a rate that is 0.578 times the rate of N2(g): rateunk/raten2=0.578. calculate the molar mass of the noble gas in g/mol using Gtaham's law of effusion (N=14.0)
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