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UTEP CHEM 1305 - Exam 3

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ExamName___________________________________MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)According to the Arrhenius concept, if HNO3were dissolved in water, it would act asA) a base.B) an acid.C) a source of hydroxide ions.D) a source of H- ions.E) a proton acceptor.2)The name given to an aqueous solution of HBr isA) hydrogen bromide.B) hydrobromic acid.C)bromic acid.D)bromous acid.E) hypobromous acid.3)Which one of the following is characteristic of a base?A) produces H3O+ in waterB) has a sour tasteC) has a slippery, soapy feelD) turns blue litmus redE) is insoluble in water4)According to the Bronsted-Lowry definition,A) an acid is a proton acceptor.B) a base produces H+ ions in aqueous solutions.C) a base is a proton donor.D) a base is a proton acceptor.E) an acid acts as the solvent.5)Identify the Bronsted-Lowry acid in the following reaction.H2O + CO2-3 ¬ HCO-3 + OH-A) H2OB)CO2-3C) HCO-3D) OH-E) H2CO36)The correct formula for sulfuric acid isA) H2SO4.B)H2SO3.C)H2SO-4.D)H2SO-3.E)SO2-4.17)The name of Al(OH)3 isA) aluminum trihydroxide.B) monoaluminum trihydroxide.C) aluminum hydroxide.D) aluminum(III) hydroxide.E) aluminum oxygen hydride.8)Which of the following is the strongest acid?A) H3PO4B) NH+4C) NaOH D) H2CO3E) HCl9)Which of the following is correctly identified?A) NH3, strong acidB) NaOH, strong baseC) HCl, weak acidD) H2CO3, strong acidE) Ca(OH)2, weak base10)Ammonium hydroxide is a weak base becauseA) it is a dilute solution.B) it is only slightly soluble in water.C) it cannot hold on to its hydroxide ions.D) it dissociates only slightly in water.E) it is completely ionized in aqueous solution.11)An acid and base react to form a salt and water in a(n) _____ reaction.A) ionization B) dissociation C) oxidation D) neutralization E) reduction12)In a neutralization reactionA) two acids react to form water.B) water and a salt react to form an acid and a base.C) an acid and a salt react to form water and a base.D) a base and a salt react to form water and an acid.E) an acid and a base react to form a salt and water.213)Which of the following is the correctly balanced equation for the complete neutralization of H3PO4 with Ca(OH)2?A) H3PO4 + Ca(OH)2 ¬ CaHPO4 + 2H2OB) 3H3PO4 + Ca(OH)2 ¬ Ca3(PO4)2 + 5H2OC) H3PO4 + Ca(OH)2 ¬ Ca3(PO4)2 + H2OD) 2H3PO4 + 3Ca(OH)2 ¬ Ca3(PO4)2 + 6H2OE) 4H3PO4 + 6Ca(OH)2 ¬ 2Ca3(PO4)2 + 12H2O14)The neutralization reaction between Al(OH)3and HNO3produces the salt with the formulaA) H2O. B) AlNO3. C) AlH2. D) Al(NO3)3.E)NO3OH.15)How many moles of H2O are produced when 1 mole of Mg(OH)2reacts with 1 mole of H2SO4?A) 1 B) 2 C) 3 D) 4 E) 516)Which of the following is a neutralization reaction?A) KCl + NaNO3 ¬ KNO3 + NaClB) HNO3 + KOH ¬ H2O + KNO3C) H2O + SO3 ¬ H2SO4D) 4Na + O2 ¬ 2Na2OE) 2NO2 ¬ 2NO + O217)What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100.mL?A) 0.267 M B) 0.150 M C) 0.200 M D) 6.67 M E) 0.100 M18)What volume of 2.5% (m/v) KOH can be prepared from 125 mL of a 5.0% KOH solution?A) 0.0040 mL B) 63 mL C) 0.10 mL D) 125 mL E) 250 mL19)What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?A) 0.075 L B) 0.25 L C) 0.75 L D) 0.083 L E) 750 L20)What volume of a 2.00 M KCl solution is required to prepare 500. mL of a 0.100 M KCl solution?A) 0.0400 mL B) 25.0 mL C) 2.00 mL D) 1.00 x 104 mL E) 5.00 x 102 mL321)What is the new mass/volume (m/v)% of a KOH solution that is prepared by diluting 110 mL of a 6% (m/v)KOH solution to 330 mL?A) 2% B) 1% C) 6% D) 12% E) 18%22)A 25.0 mL sample of H3PO4 requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is themolarity of the acid?H3PO4 + 3NaOH ¬ Na3PO4 + 3H2OA) 0.333 M B) 3.00 M C) 1.50 M D) 1.00 M E) 0.750 M23)A 25.0 mL sample of H2SO4 requires 20.0 mL of 2.00 M KOH for complete neutralization. What is the molarityof the acid?H2SO4 + 2KOH ¬ K2SO4 + 2H2OA) 2.00 M B) 2.50 M C) 0.800 M D) 1.60 M E) 1.25 M24)How many milliliters of 0.400 M NaOH are required to completely neutralize 20.0 mL of 0.200 M HCl?A) 50.0 mL B) 40.0 mL C) 0.100 mL D) 20.0 mL E) 10.0 mL25)How many milliliters of 0.200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H3PO4?A) 7.50 mL B) 2.50 mL C) 0.833 mL D) 5.00 mL E) 15.0 mL26)How many milliliters of 0.100 M Ba(OH)2are required to neutralize 20.0 mL of 0.250 M HCl?A) 100. mL B) 50.0 mL C) 25.0 mL D) 0.250 mL E) 0.50 mL27)When a piece of magnesium metal is added to hydrochloric acid, what gas is produced?A) oxygen B) chlorine C) nitrogen D) carbon dioxide E) hydrogen28)How many mL of a 0.0100 M solution can be made from 100.0 mL of a 1.00 M solution of sodium chloride inwater?A) 100 mL B) 500 mL C) 1000 mL D) 5000 mL E) 10,000 mLFor the next two problems, consider the reaction in which magnesium reacts with an HCl solution .Mg(s) + 2HCl(aq) ¬ MgCl2(aq) + H2(g)29)If 2.00 g of Mg reacts completely with 50.0 mL of HCl solution, what is the molarity of the HCl solution?A) 1.65 M B) 80.0 M C) 8.00 M D) 0.823 M E) 3.29 M30)If 2.00 g of Mg reacts with an excess HCl solution, how many liters of hydrogen gas are produced at STP?A) 3.69 L B) 1.84 L C) 5.53 L D) 22.4 L E) 0.165 LSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.31)The conjugate acid of HPO42- is _____.432)Is a solution of sodium phosphate in water acidic or basic?33)In a titration experiment, a student used 24.13 mL of 0.111 M sodium hydroxide to neutralize 20.00 mL of ahydrochloric acid solution. What was the molarity of the acid solution?34)A student had 2.0 L of a sodium hydroxide solution that had a concentration of 0.4000 M. The student neededto make 500 mL of a 0.1000 M solution. How many mL of the concentrated solution was needed?35)A student had 5.0 L of a sulfuric acid solution available, that had a concentration of 1.000 M. The studentneeded to make 200.0 mL of a 0.2000 M solution. How much of the concentrated solution was needed?TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.36)An ammonium chloride solution should have an acidic pH.37)Magnesium metal is not attacked by sulfuric acid solutions.38)Sodium carbonate gives a basic solution in water.39)For most reactions of acids with bases, the resulting products are a salt and water.MATCHING. Choose the item in column 2 that best matches each


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UTEP CHEM 1305 - Exam 3

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