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Zanzabum
3 years ago
13

Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows

the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnO4 has a concentration of 2.6 × 10-4 M. The pipette has a volume of 10.0 mL. What is the amount of KMnO4 delivered to the solution, in moles
Chemistry
1 answer:
Nady [450]3 years ago
4 0

Answer:

2.6\times 10^{-6}\ moles

Explanation:

Considering:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For potassium permanganate :

Molarity = 2.6\times 10^{-4}\ M

Volume = 10.0 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 10.0×10⁻³ L

Thus, moles of potassium sulfate :

Moles=2.6\times 10^{-4} \times {10.0\times 10^{-3}}\ moles

Moles of potassium permanganate = 2.6\times 10^{-6}\ moles

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