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patriot [66]
2 years ago
6

Why should the sample size be such that not more than 50 mL of titrant is required to reach the endpoint?

Advanced Placement (AP)
1 answer:
Bingel [31]2 years ago
7 0

Answer:

Do NOT attempt to fill a buret precisely to the 0.00-mL mark at the top. This is a waste of time, as all volumes delivered by a buret are determined from the difference between initial and final readings. This step is important because the hanging drop is part of the volume delivered by the buret.

Explanation:

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Solve the following systems of 3-variable linear equations.​
Zina [86]

Answer:

x = 9/25, y = 7/25, z = 4/25

Explanation:

step 1: solve for y in first equation to use substitution

y = -2x + 1

step 2: insert into second equation to eliminate y variable and work with two variables

3(-2x+1) + z = 1 (now distribute)

-6x + 3 + z = 1 (bring over the -3)

-6x + z = -2

step 3: now left with -6x + z = -2 and x + 4z = 1, so eliminate z

-6x + z = -2 (multiply by 4)

4(-6x + z = -2)

-24x + 4z = -8

-

x + 4z = 1 (brought down third equation)

-25x = -9

x = 9/25

then just plug in x into the third equation to solve for z, followed by plugging it into the first equation to solve for y. you should end with y = 7/25 and z = 4/25

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