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Why is K+ larger than Ca^2+?

Calculating the total mass of Ca2+ using measured ppm?

  • I measured Ca2+ using AAS and found out that i have 200 ppm of Ca2+ I then need to use this results to calculat e the amount of Ca2+ in a 100 ml solution which I prepared from sea shell...the mass of the seashell was 3.3 g

  • Answer:

    the ppm of the solution gives us the mg/L of Ca2+ We have 200ppm Ca 2+ or 200mg Ca2+ in 1000mL solution mass of Ca in 100 mL of your solution = 20mg of Ca2+ If all of the sea shell was dissolved and made up to 100 mL of solution we have % Ca = 20 x 10 ^-3g / 3.3g = 0.61% Ca in your sea shell

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ppm is numerically equal to mg/L You have 200ppm Therefore you have 200mg Ca2+ in 1000mL solution OR you have 20mg Ca2+ in 100mL solution

Trevor H

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