General Chemistry Questions & Answers

General Chemistry Questions & Answers - Hypo = less and -per = more oxygen - CORRECT ANSWER - ClO- = Hypochlorite ClO2- Chlorite ClO3- Chlorate ClO4- Perchlorate - ite and -ate - CORRECT ANSWER - -ite = less oxygen NO2- = Nitrite SO3^2- = Sulfite -ate = more oxygen NO3- = Nitrate SO4^2 = Sulfate 11.) Which of the following will cause the greatest increase in the boiling point of water when it is dissolved in 1.00 kg H20? .46 mol calcium sulfate .54 mol iron(III) nitrate 1.09 mol acetic acid 1.11 mol sucrose - CORRECT ANSWER - B. .54 mol iron(III) nitrate 2.) Which phases of solvent and south can form a solution? I. Solid solvent, gaseous solute II. Solid solvent, solid solute III. Gaseous solvent, gaseous solute - CORRECT ANSWER - D. Solid solvent, gaseous solute, Solid solvent, solid solute and Gaseous solvent, gaseous solute All three choices can make a solution as long a s the two components create a mixture that is of uniform appearance (homogenous). Hydrogen in platinum is an example of a gas in a solid. Brass and steel are examples of homogenous mixtures of solids. The air we breathe is an example of a homogenous mixture of gases; while these are more coolly simply referred to as mixtures, they still fit the criteria of a solution. 4.)Which of the following explanations best describes the mechansim by which solute particles affect the melting point of ice? Melting point is elevated because the kinetic energy of the substance increases Melting point is elevated because the kinetic energy of the substance decreases Melting point is depressed because solute particles interfere with lattice formation Melting point is depressed because solute particles enhance lattice formation. - CORRECT ANSWER - C. Melting point is depressed because solute particles interfere with lattice