Student IDANo. 0034400 Date 1 November,20m Part A. Multiple-Choice rele or darke
ID: 587391 • Letter: S
Question
Student IDANo. 0034400 Date 1 November,20m Part A. Multiple-Choice rele or darken the letter that corre Question (4.0 points each) Calculators may 1. A salt sample is placed into some water and nearly all of it dissolves without stirring or heating The resulting solution is A. supersaturated. NOT be shared B. polr Csaturated. D. unsaturated. E. impossible to determine. 2. A substance that partially dissociates in solution is called a A. weak electrolyte. E. strong electrolyte. B. nonelectrolyte. 3. When KCI dissolves in water A. the Cl B. the CI i C. the K ions are attracted to CTions on the KCI crystal. D. the K' ions are attracted to the partially negative oxygen atoms of the water molecule E. the K ions are attracted to the partially positive hydrogen atoms of the water molecule. ions are attracted to dissolved K' ions ons are attracted to the partially negative oxygen atoms of the water molecule 4. During the process of diluting a solution to a lower concentration, A. the volume of the solution does not change. B. the amount of solute does not change. C. there is more solute in the concentrated solution. D. the amount of solvent does not change. E. water is removed from the concentrated solution 5. At 20 °C, the solubility of NaCl is 36 g in 100 g of H,0. If 43 grams of NaCI are added to 125 grams of B. the solution will freeze. C. the solution will start boiling A. 76 g of NaCI will dissolve. D. a saturated solution will form. E. unsaturated solution will form 6. A solution is made by combining 4.00 g of sugar and 100 mL of water (density 1.00 gm). What is the concentration in % w/w? A. 26.0 B. 4.00 C. 100. D. 50 A solution with the same osmotic pressure as the blood is A. isotonic to the blood. C. hypertonic to the B. hypotonic to the blood. E. molar to the blood. 7. D. nontonic to the blood. Ca2 4. If Cl is the only anion in the solution, what is the CIr concentration, in mEg? A. 4 mEq/LB 159 mE/ C. 155 mEgL D 147 mEg E. 151 8. A sample of Ringer's solution contains the following concentration (mEq/L) of cations: Na 1 E.None of the answers D. 81.6 C. 0.0816 9. What is the molarity of a solution containing 0.325 moles of solute in 251 mL of solution? B. 1.29 salt A. 0.00129 C. HO. D. NHions. 10. According to the Arrhenius concept, what is produced when an acid dissolves in water? A. H ions. B. OH- ions.Explanation / Answer
Q1. (D) Unsaturated soltion
Justification: Since the addition of salt to the water dissolves easily, this means more salt can be added to the water, so the resulting solution is UNSATURATED SOLUTION
Q2. (A) Weak Electrolyte
Q3. (D)
Justification: When KCl dissolves in water, it gives K+ and Cl- ions.
There will be ion-dipole interaction between K+ ions and partially negatively charged oxygen atoms of water molecules. The positively charged K+ ion will be surrounded by water molecules by ion-dipole intearaction.
Q4. (B) The amount of solute does not change