Chemistry, 26.05.2021 01:10 serenityarts123
A buffer solution is prepared by adding NaH2PO4
to a solution of H3PO4 (phosphoric acid).
H3PO4(aq) = H+ (aq) + H2P04- (aq)
What happens if NaOH is added?
А
B
shifts to
reactants
remains
the same
shifts to
products
Answers: 1
Chemistry, 22.06.2019 05:30
A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.
Answers: 1
Chemistry, 22.06.2019 20:00
For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.
Answers: 2
Chemistry, 23.06.2019 15:00
What do we call the rows on the periodic table? a. periodb. familyc. groupd. metals
Answers: 1
Chemistry, 23.06.2019 16:00
The electron configuration for chromium is 1s22s22p63s23p63d54s1 instead of 1s22s22p63s23p63d44s1. the configuration is an exception to the pauli exclusion principle heisenberg uncertainty principle aufbau principle schrödinger equation
Answers: 3
A buffer solution is prepared by adding NaH2PO4
to a solution of H3PO4 (phosphoric acid).
English, 21.09.2020 17:01
Computers and Technology, 21.09.2020 17:01
Arts, 21.09.2020 17:01
Computers and Technology, 21.09.2020 17:01
History, 21.09.2020 17:01
History, 21.09.2020 17:01
Social Studies, 21.09.2020 17:01
English, 21.09.2020 17:01