jewellransom05 jewellransom05

03-05-2021
Chemistry

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How many grams of potassium carbonate are needed to make 300ml of a 4.5M solution?

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SajjadGedow SajjadGedow

03-05-2021

Answer:

186.3g

Explanation:

4.5moles of K₂CO₃ is in 1000ml

? moles of K₂CO₃ is in 300 ml

(4.5 × 300)/ 1000 = 1.35 moles of K₂CO₃

1 mole of K₂CO₃ = (39 × 2) + 12 + (16 × 3) = 78 + 12 + 48 = 138g

1.35 moles of K₂CO₃ = ?

= (1.35 × 138)/1 = 186.3g

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