Question
Asked Mar 6, 2020
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How many grams of sodium dichromate, Na2 Cr207,
should be added to a 100.0-mL volumetric flask to prepare
6.3 x 10-2 M Na2 Cr2 O7 when the flask is filled to the
mark with water?
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How many grams of sodium dichromate, Na2 Cr207, should be added to a 100.0-mL volumetric flask to prepare 6.3 x 10-2 M Na2 Cr2 O7 when the flask is filled to the mark with water? Submit Answer Try Another Version 10 item attempts remaining

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Expert Answer

Step 1

First of the given data is collected as:

Chemistry homework question answer, step 1, image 1

Now, to find the mass of sodium dichromate (Na2Cr2O7) that should be dissolved to prepare the desired solution, the number of moles of the sodium dichromate should be calculated first.

Step 2

Molarity is defined as the number of moles of solute dissolved in per liter of solution.

Chemistry homework question answer, step 2, image 1

Hence, the moles of solute of sodium dichromate will be calculated as:

Chemistry homework question answer, step 2, image 2

 

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