1. Fluorine compounds are added to water, the concentration being 0.90 ppm. a. What amount of fluoride present 1.0g of water? Solution- (just need to know what the number mean) Divided 0.90 pm by 1,000,000, which I assume is the grams of substance per kilogram? Then divided that number by fluorines molar mass (19) to get the answer of 4.7x10^-8 b. How much fluoride ions would you swallow if you drank 200ml water? 2. Convert 0.00036M (molarity) of Ca(OH)2 to ppm Solution- I found the molar mass of the compound being ~74 3. For 0.20M of K2SO4, calculate mol of K+ ions, Sulfate ions and oxygen atoms Solution - Molar mass I found to be ~174 4. Why should antacid tables be chewed before being swallowed? 5. Find concentration of vitamin c in g L^-1 when 40mg/100ml and do same for carbonhydrate at 8.5g/100ml Solution- I'm guessing I just divided 40mg/100ml and 8.5g/0.1L but not sure if this makes sense?