8. What was the original concentration in the BHL sample, if the dilution is 1:500 and the concentration 0.07 mg/ml

The original concentration is "35 mg/ml".

Explanation:

According to the question,

The solution is diluted,

= 1:50

The initial volume,

V1 = 1 ml

Final concentration,

= 0.07 mg

then,

The final volume,

V2 = 500 ml

As we know,

⇒

or,

⇒

On substituting the values, we get

⇒      

⇒      

⇒