Consider the reaction:
What volume of 0.150 M Li2S solution is required to completely react with 125 mL of 0.150 M Co(NO3)2?
Solution: Here, we are going to calculate the mass of alcohol circulating in the blood if the total blood volume is 5.0 L and BAC is 0.10. Step1: BAC or Blood Alcohol Concentration means units of grams of alcohol present per 100 mL of blood. For the problem given above, BAC = 0.10 which means, mass of alcohol present in 100 mL blood = 0.10 g Step2: Now, amount of alcohol present in 100 mL of blood = 0.10 g Therefore, amount of alcohol present in 5.0 L of blood = (0.10 g / 100 mL) X 5.0 L = 0.0010 g/mL X 5000 mL = 5.0 g Thus, required mass of alcohol circulating in the blood is 5.0 g. -------------------