Specific conductance is expressed in terms of Ohm- cm .a Ohm/cm .b O Ohm.cm .c O Ohm- cm1 .d O

1. A solution contains 480 mg/l of FeC13; temperature is 15 C. a) What is the TDS of this solution? b) What is the approximate conductivity of the solution in micromhos/cm? Remember: TDS (Total Dissolved Solids) is the summation of concentration all the ions in the solution. Use the equation for the relationship of TDS and Conductivity in the slides to calculate the conductivity. 2. Historically, in the United States, the prevalent water-born infectious diseases have been typhoid, cholera, and dysentery. How have these diseases been virtually eliminated? Currently, the prevalent infectious diseases are giardiasis and cryptosporidiosis, causing diarrhea that can be life-threatening for persons with immunodeficiency syndrome. What actions are being taken to reduce the probability of waterborne transmission of these diseases? 3. Can a person be infected with Covid-19 through drinking water? 4. Can a person be infected with HIV through drinking water?

M 12

The weight percent %W/W of a saturated solution of potassium chloride in 200CO was: (NOTE: the solution contain 298g/L and D=1.17g/cm3) * 40.66%W/W W/W% 75.20 W/W% 25.47 10.54%W/W

Q 2 please