QUESTION 1Which of the following ions when dissolved in water should to contribute to water hardness?Cl-Mg2 C17H35CO2-OH-H 0.25 points QUESTION 2Why does it take more shampoo to get a sudsy lather when showering with hard water than with soft water?Hard water ions bind to soap anions disabling their lathering properties.Hard water ions cause soap anions to evaporate from the water.Hard water ions cause soap anions to convert to CaCO3(s).0.25 points QUESTION 3What does the unit ppm stand for?parts per meterpermanent picometerparticles per cubic meterparts per millionparts per megaton0.25 points QUESTION 4What is the “water hardness” of a solution that is 0.001 M CaCl2?1.00 ppm40.0 ppm100 ppm3.00 ppm1000 ppm0.25 points QUESTION 5What should you use as your standard for soft water?0.001 M CaCl2Tap waterDistilled waterMineral water0.25 points QUESTION 6What should you use as your standard for hard water?0.001 M CaCl2Tap waterDistilled waterMineral water0.25 points QUESTION 7What should you observe in a heated water sample that contains temporary hardness?a color changesolid formation or cloudinessa bad smellnone of these0.25 points QUESTION 8Which is a larger concentration: 1 ppm or 1 ppb?1 ppm1 ppb
