Biology, 14.12.2019 02:31, Tinytrevi7430
Astudent is preparing a solution of 0.1 m tris-cl (ph 7.0) with 200 mm nacl. to adjust the ph, the student started with concentrated hcl and overshot, reducing the ph to 4.0. to correct this, the student added naoh until the ph reached 7.0 and then brought the solution to volume. which of these statements describes the prepared buffer?
a. the buffer is correctly prepared.
b. the ph is not accurate because both acid and base were used.
c. the ph is accurate, but the solution will have excess salt.
d. the ph is accurate, but the concentration of tris will be incorrect.
e. the ph is accurate, but the volume will be too high.
Answers: 2
Biology, 22.06.2019 07:30, TheaMusic524
Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.
Answers: 2
Astudent is preparing a solution of 0.1 m tris-cl (ph 7.0) with 200 mm nacl. to adjust the ph, the s...
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