A/S Chemistry mass of product: EVERYONE PLEASE READWatch
Fluoride ion (F- ) + Charcoal (C) => Carbon tetrafluoride (CF4)
The product CF4, is harmless. The firm claims that 1 kg of charcoal will remove 6.3 kg of fluoride ion. Do you believe this claim? Explain your answer.
to balance the equation, you need to have:
C + 4 F- --->CF4 + 4 e-
For the mass calculations, you are only concerned with the left side of that equation. Using RAMs,
12g of C would react with 4 x 19g of F- = 76g of F-.
divide by 12 (to get mass of F reacting with 1g of C)
1g C will react with 76/12 = 6.3g F-
here the answer is already obvious, but to keep the examiners happy, multiply back up to kg (by 1000)
1kg C will react with 6.3kg of F- so yes, the claim is true.