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A 500 g tooth paste sample has 0.2 g flu...

A 500 g tooth paste sample has 0.2 g fluride concentration. What is the concentration of F in terms of ppm level?

Text Solution

Verified by Experts

The correct Answer is:
400
As 500 g of tooth-paste has = 0.2 g of `F^(-)`
So, `10^(6)g` of toothpaste has `=(0.2g xx 10^(6)g)/(500g)F^(-)=400g` of `F^(-)`
Hence, concentration in ppm is 400.
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