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phenol (C6H60, molar mass = 94. which was once used as an antiseptic, and is still used in some sore throat sprays. In fact, the brand Chloraseptic contains 1.4% phenol, that is, 1.4 g phenol per 100. mL solution. What is the molarity? organ

phenol (C6H60, molar mass = 94. which was once used as an antiseptic, and is still used in some sore throat sprays. In fact, the brand Chloraseptic contains 1.4% phenol, that is, 1.4 g phenol per 100. mL solution. What is the molarity? organ

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Chapter11: Properties Of Solutions
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% m/m % m/v % v/v 3. There is a weak organic acid called phenol (C6H6O, molar mass = 94.11) which was once used as an antiseptic, and is still used in some sore throat sprays. In fact, the brand Chloraseptic contains 1.4% phenol, that is, 1.4 g phenol per 100. mL solution. What is the molarity? 4. On the other hand, amylmetacresol (AMC, C12H18O, molar mass 178.27) is an active ingredient some formulations of Cepacol throat lozenges. If the concentration of AMC is 1.7x10-3 M in an individual 2.00 mL dose, how many milligrams of AMC are present in that dose? 5. You have a stock solution of phenol at the highest possible concentration (0.90 M), which is unfortunately strong enough to cause tissue damage. To use it as an local antiseptic, you must dilute it to 500. mL of 0.10 M phenol. How much of the stock solution will you need? 6. Write the correct equilibrium expression for the following reactions: a) N203(g) NO(g) + NO2(g) b) Pink cobalt(II) ions can react with colorless chloride ions to make the blue tetrachlorocobaltate ion, CoCl42-. Co?*(ag) + 4 CI (ag) = CoCl4²-(ag)
Transcribed Image Text:% m/m % m/v % v/v 3. There is a weak organic acid called phenol (C6H6O, molar mass = 94.11) which was once used as an antiseptic, and is still used in some sore throat sprays. In fact, the brand Chloraseptic contains 1.4% phenol, that is, 1.4 g phenol per 100. mL solution. What is the molarity? 4. On the other hand, amylmetacresol (AMC, C12H18O, molar mass 178.27) is an active ingredient some formulations of Cepacol throat lozenges. If the concentration of AMC is 1.7x10-3 M in an individual 2.00 mL dose, how many milligrams of AMC are present in that dose? 5. You have a stock solution of phenol at the highest possible concentration (0.90 M), which is unfortunately strong enough to cause tissue damage. To use it as an local antiseptic, you must dilute it to 500. mL of 0.10 M phenol. How much of the stock solution will you need? 6. Write the correct equilibrium expression for the following reactions: a) N203(g) NO(g) + NO2(g) b) Pink cobalt(II) ions can react with colorless chloride ions to make the blue tetrachlorocobaltate ion, CoCl42-. Co?*(ag) + 4 CI (ag) = CoCl4²-(ag)
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