Medgar Evers College CHM 201 QUIZ 3 The process of determining the concentration
ID: 557581 • Letter: M
Question
Medgar Evers College CHM 201 QUIZ 3 The process of determining the concentration of a solution is known as a. Neutralization b. Titration c. Standardization d. Equivalent point I. The technique of accurately measuring the volume of a solution required to react with another reagent is termed a. Standardizati b. Endpoint e, Titration d. Qualitative analysis 3. . is where the indicator changes color whiles... ........ is when stoichiometric amount of both analyte and titrant has reacted. a. Equivalence point, endpoint b. Titre vale, equivalence point c. Equivalence point, titre value d. Endpoint, equivalence point What is the molarity of a solution that contains 2.38 g of H C0.2H2O in 200 ml of solution? (FW- 126) a. 0.01 M b. 0.02 M c. 0,09 M d. 0.10 M According to the solubility rules, all chlorides salts are soluble in water except a. Sodium chloride b. Silver chloride 4. 5. 7c. Ammonium chloride d. Potassium chloridoe 6. All the following are chemical processes that can lead to the removal of ions from solution, thus serving as driving force for metathesis to occur except a. Formation of a precipitate b. Formation of a weak electrolyte c. Formation of a gas that escapes from solution. d. None of the abovExplanation / Answer
Q1
we use titration in order to find the concentration of an unkown, given a known substance concentration
choose B
Q2
this is standardization, in which we try to give a standard value of the concentration choose A
Q3
End point --> we assume equivalence point is here, the indicator changes color.
The equivalence point is the point in which there is exactly stoichioemtric relationship
Q4
M = mol/V = (mass/MW) / V = (2.38/126) / 0.2 = 0.0944M
choose C
Q5
silver chlorides, since Silver will not be soluble as AgCl(s) forms preicptiate
Q6
a)
true, since Ag+ + Cl- forms AgCl, therefore decreases ions
b)
false, choose this one
c)
H+ + H+ = H2(G) , therefore decrease [H+´]
choose B