Chemistry, 20.12.2021 22:10 jesuscruzm2020
The molar absorptivities at 430 and 570 nm of the weak acid HIn (Ka = 1.42 ? 10-5) and its conjugate base In- were determined by measurements of strongly acidic and strongly basic solutions of the indicator. Under this conditions, essentially all of the indicator was in the HIn and In- form, respectively. The molar ab-sorptivities of HIn and In- at 430 nm and 570 nm were 6.30 ? 102 and 7.12 ? 103, and 2.06 ? 104 and 9.61 ? 102, respectively. Calculate absorbance data for unbuffered solutions that have total indicator concentrations ranging from 2 ? 10-5 to 16 ? 10-5 M.
Answers: 1
Another question on Chemistry
Chemistry, 22.06.2019 12:40
When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign
Answers: 2
Chemistry, 23.06.2019 00:00
Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.
Answers: 3
Chemistry, 23.06.2019 08:10
An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?
Answers: 1
Chemistry, 23.06.2019 08:30
Kelly has come up with an explanation for why her sister is sometimes in a good mood and other times in a bad mood. she speculates that it is based on the hours of sleep her sister got the previous night. this explanation for her sister's behaviors is an example of a(n)
Answers: 3
You know the right answer?
The molar absorptivities at 430 and 570 nm of the weak acid HIn (Ka = 1.42 ? 10-5) and its conjugate...
Questions
History, 22.07.2019 05:00
History, 22.07.2019 05:00
English, 22.07.2019 05:00
English, 22.07.2019 05:00
Mathematics, 22.07.2019 05:00
