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11 Nov 2019
Explain please. Number 95 and 96. os. A solution of sodium oxalate (Na?C20s) in acidic solution is tirated (KMn04) according to the following balanced chemical equation 2KMnO4(aq) + 8H2SOdaq) + 5Na2C2Odal) â 2Mr SOd q) + Sha What volume of 0.0203 M KMnOs is required to titrate 0.119g of Nan solution of potassium perimainganate dissolved a. 2.34 mL b. 5.86 mL c.17.4 mL d.43.7 mL e. 20 mL as used. What was rodie acid is iated with d0s21 MNaOH. At the endpoint, it is found thar satd with 00521 MNaOH. At the end a.0.0978 M b. 1.95 M c. 0.0521 M a 0.0978 M of the weak acid? e.0.0277M 97. Zn reacts with hydrochloric acid. Zn(s) + 2 HCl(aq) â ZnCl2(aq) + H2(g) What volume of 3.05 M HCI(aq) will react with 25.0 gZn(s)? 251 L b. 4.01 L d. 0.0627 L e. 2.33 L 98. What minimum mass of cobalt (II) nitrate must be added to 60.0 mL of a 0.0890 M phosphate solution in order to completely precipitate all of the phosphate as solid cobalt () phosphate? 2PO'-(ag) + 3Co(NO3)2(ag) â Co3(PO4)2(s) + 6NO3-(aq) a. 0.976 g b. 2.93 g c.0.6518d. 0.325g 1.46g 99. Which of the following statements is/are CORRECT? 1. Absorbance is directly proportional to the intensity of the incident light. 2. Absorbance is inversely proportion 3. Absorbance is directly proportional to the path length of the light a. I only b.2 only 3 only d.2 and 3 e.1,2, and 3 al to the analyte concentration. (where eis path length and C is concentration) is known as the r -Lan 100. The following equation: A-ex Cengage Learning Testing, Powered by Cognero
Explain please. Number 95 and 96.
os. A solution of sodium oxalate (Na?C20s) in acidic solution is tirated (KMn04) according to the following balanced chemical equation 2KMnO4(aq) + 8H2SOdaq) + 5Na2C2Odal) â 2Mr SOd q) + Sha What volume of 0.0203 M KMnOs is required to titrate 0.119g of Nan solution of potassium perimainganate dissolved a. 2.34 mL b. 5.86 mL c.17.4 mL d.43.7 mL e. 20 mL as used. What was rodie acid is iated with d0s21 MNaOH. At the endpoint, it is found thar satd with 00521 MNaOH. At the end a.0.0978 M b. 1.95 M c. 0.0521 M a 0.0978 M of the weak acid? e.0.0277M 97. Zn reacts with hydrochloric acid. Zn(s) + 2 HCl(aq) â ZnCl2(aq) + H2(g) What volume of 3.05 M HCI(aq) will react with 25.0 gZn(s)? 251 L b. 4.01 L d. 0.0627 L e. 2.33 L 98. What minimum mass of cobalt (II) nitrate must be added to 60.0 mL of a 0.0890 M phosphate solution in order to completely precipitate all of the phosphate as solid cobalt () phosphate? 2PO'-(ag) + 3Co(NO3)2(ag) â Co3(PO4)2(s) + 6NO3-(aq) a. 0.976 g b. 2.93 g c.0.6518d. 0.325g 1.46g 99. Which of the following statements is/are CORRECT? 1. Absorbance is directly proportional to the intensity of the incident light. 2. Absorbance is inversely proportion 3. Absorbance is directly proportional to the path length of the light a. I only b.2 only 3 only d.2 and 3 e.1,2, and 3 al to the analyte concentration. (where eis path length and C is concentration) is known as the r -Lan 100. The following equation: A-ex Cengage Learning Testing, Powered by Cognero
Collen VonLv2
1 Feb 2019