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1. What is the MW of the analyte? 2. What is the meq of the analyte? 3. What will be the weight (in grams) of the analyte if the standardization is to be quartered? 4. What will be Normality of the solution if 7.5ml of the titrant was consumed in the standardization? 5. What is the average Normality if two or more trials were conducted with the values of 0.102N and 0.105N?

1. What is the MW of the analyte? 2. What is the meq of the analyte? 3. What will be the weight (in grams) of the analyte if the standardization is to be quartered? 4. What will be Normality of the solution if 7.5ml of the titrant was consumed in the standardization? 5. What is the average Normality if two or more trials were conducted with the values of 0.102N and 0.105N?

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Chapter11: Properties Of Solutions
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1. What is the MW of the analyte?
2. What is the meq of the analyte?
3. What will be the weight (in grams) of the analyte if the standardization is to be quartered?
4. What will be Normality of the solution if 7.5ml of the titrant was consumed in the standardization?
5. What is the average Normality if two or more trials were conducted with the values of 0.102N and 0.105N? 

Preparation and Standardization of 0.1 N Potassium Permanganate Preparation: 1. Dissolve 3.3 g of potassium permangantate in 1000 ml of water in a flask 2. Boil the solution for about 15 minutes, then place a stopper in the flask 3. Allow the solution to stand for at least two days to ensure complete decomposition of any organic matter that may be present in water. Filter the solution through a filter paper with asbestos to remove all traces of manganese dioxide, which if present acts as a catalyst to promote the formation of more manganese dioxide at the expense of the permanganate lon. 4. Standardization: Weigh 200 mg sodium oxalate, previously dried at 110 'C to constant weigh, then dissolve in 250mi water. Sodium oxalate is the best standard solution to use because it can be obtained in very pure condition. 2. 1. Add 7 ml of sulfuric acid, then heat to about 70 C. The addition of sulfuric acid will keep the hydrogen-ion concentration reasonably constant throughout the titration, thereby preventing the formation o manganese dioxide and supplying the hydrogen ions used up in the reduction of the permanganate ion. 3. Slowly titrate the solution against the prepared potassium permanganate, until a pale pink color. The temperature at the conclusion of the litration should not be less than 60 °C. II is important to note that potassium permanganate is a colored solution, therefore the top of the meniscus is read, instead of the lowest part. Chemical reaction involved: Na2C204 + KMNO4+ H2SO4→MNSO4 + Na2SO4 + K2SO4 + CO2 + H2O Probable atormic weights to be used: C=12 H-1 K-39 Mn= 55 Na=23 O-16 S-32
Transcribed Image Text:Preparation and Standardization of 0.1 N Potassium Permanganate Preparation: 1. Dissolve 3.3 g of potassium permangantate in 1000 ml of water in a flask 2. Boil the solution for about 15 minutes, then place a stopper in the flask 3. Allow the solution to stand for at least two days to ensure complete decomposition of any organic matter that may be present in water. Filter the solution through a filter paper with asbestos to remove all traces of manganese dioxide, which if present acts as a catalyst to promote the formation of more manganese dioxide at the expense of the permanganate lon. 4. Standardization: Weigh 200 mg sodium oxalate, previously dried at 110 'C to constant weigh, then dissolve in 250mi water. Sodium oxalate is the best standard solution to use because it can be obtained in very pure condition. 2. 1. Add 7 ml of sulfuric acid, then heat to about 70 C. The addition of sulfuric acid will keep the hydrogen-ion concentration reasonably constant throughout the titration, thereby preventing the formation o manganese dioxide and supplying the hydrogen ions used up in the reduction of the permanganate ion. 3. Slowly titrate the solution against the prepared potassium permanganate, until a pale pink color. The temperature at the conclusion of the litration should not be less than 60 °C. II is important to note that potassium permanganate is a colored solution, therefore the top of the meniscus is read, instead of the lowest part. Chemical reaction involved: Na2C204 + KMNO4+ H2SO4→MNSO4 + Na2SO4 + K2SO4 + CO2 + H2O Probable atormic weights to be used: C=12 H-1 K-39 Mn= 55 Na=23 O-16 S-32
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