Chemistry, 12.03.2021 14:50 shymitch32
Use the titration curve to determine the equivalence points for the unknown acid, the volumes at 50% of the equivalence points, Ka1, and Ka2 for the unknown acid. Because we recorded the pH at about 1 mL increments, we will need to do some estimating of pH values. When doing the estimating, a good approach is to average the known values on either side of the point you want to estimate. There will be some error in our readings, but it should be small enough for our purposes. (1pts) Select the unknown you used for this experiment. A Saved (2pts) Identify the second equivalence point on the titration curve. Use the two volume measurements where the largest change in pH occurs. Take the average of these two volumes to find where the equivalence occurs. What is the volume needed to reach the second equivalence point
Answers: 3
Chemistry, 22.06.2019 01:20, whrjegt4jrnfdvj
1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
Answers: 2
Chemistry, 22.06.2019 17:30, nijanicole164
A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159
Answers: 2
Chemistry, 22.06.2019 19:00, Farhan54019
Which change to the system wood cause the freely-moving piston to lower?
Answers: 1
Use the titration curve to determine the equivalence points for the unknown acid, the volumes at 50%...
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