0.520 gram sample containing Ni(NH_3)6 Cl_2 is dissolved in HNO_3, and the chlor
ID: 926339 • Letter: 0
Question
0.520 gram sample containing Ni(NH_3)6 Cl_2 is dissolved in HNO_3, and the chloride is precipitated using AgNO_3. The resulting AgCl (MM =143.3 g/mol) precipitate is found to weigh 0.132 grams. What is the mass of chloride (MM =35.45 g/mol) in the sample 0.0327 grams 0.132 grams 0.0115 grams 0.520 grams The titration curve shown below corresponds to which one of the following types of acid-base titrations The titration of a strong acid with a strong base The titration of a weak acid with a strong base The titration of a strong base with a strong acid The titration of a weak base with a strong acid Referring to the titration curve shown in Question 11 above, for what volume of alkali added is the value of pH equal to the pKa for an acid at 0 mL of alkali at 25 mL of alkali at 50 mL of alkali at 75 mL of alkali How many mL of 0.125 M NaOH are required to neutralize 21.4 mL of0.075 M HC1 21.4mL 35.7 mL 17.8 mL 12.8 mL| Shown below is a plot of a pH titration curve for the titration of maleic acid with sodium hydroxide (pH vs. mL of NaOH). In this titration 0.050 M NaOH is used as the titrant. The sample of maleic acid being titrated weighs 0.232 g. What is the molecular weight for magUfe acidExplanation / Answer
10) Mass of AgCl = 0.132 g
Moles of AgCl = 0.132/143.5 = 0.9198 millimoles
Moles of Cl- = 0.9198
Mass of Cl- = 0.9198x35.45 = 32.606 millimograms
11) B. Its titration of weak acid by strong base...so gradually pH increases
13) M1V1= M2V2
0.125xv = 21.4x0.075
V = 21.4x00.75/.125 =12.84 ml
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