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can someone explain how this is wrong? I don’t think it is wrong but my chem teacher deducted points. so why?

can someone explain how this is wrong? I don’t think it is wrong but my chem teacher-example-1

1 Answer

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Answer: measure the mass (48.425g) of KCl

Step-by-step explanation:

To prepare the solution 0.65M KCl we must measure the mass of KCl that would be dissolved in 1L of the solution. This can be achieved by:

Molar Mass of KCl = 39 + 35.5 = 74.5g/mol

Number of mole (n) = 0.65

Mass conc of KCl = n x molar Mass

Mass conc of KCl = 0.65 x 74.5 = 48.425g

Therefore, to make 0.65M KCl, we must measure 48.425g

User Vishakha Yeolekar
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