If given the option between using a P1000 and a P200 pipetter to dispense 200 uL, the P200 should be chosen as it can pipette that amount with greater
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If given the option between using a P1000 and a P200 pipetter to dispense 200 uL, the P200 should be chosen as it can pipette that amount with greater
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- 4. A fat sample with combination of acids contain standard hydrochloric acid for blank and sample with 8mL and 5mL respectively. The normality of the standard hydrochloric acid is 0.93N and the weight of the sample is 3 grams. Calculate the saponification value.A 20.330 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 74.044 g of water. A 10.245 g aliquot of this solution is then titrated with 0.1074 M HCl. It required 29.47 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH, in the aqueous waste. wt% NH3 = APR 9 $ 4 R dº 10 % . 5 Search or type URL n T tv < 60 ♫ MacBook Pro A Y & N 7 907 U * 8 00 + I A ( 9 © | O - O W P J { + [ % ] deleteIf an instrument gives a response of 1240 for a standard containing 8 ppm of a substance, how much if this substance is in a sample that gives a response of 1705? Are any assumptions needed?
- Sum of coefficients C7H8 + O2 --> CO2 + H2O after balancingA solution of HCl was titrated against sodium carbonate. What is the average normality of acid in the given data? (MW Na₂CO3 = 106) T2 0.3479 0.3562 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (mL) Vol HCl used (mL) 35.10 39.40 N of HCl (eq/L) 0.1954 0.1870 Average N of HCl (eq/L)< Report - Gramma NGLSync X OWLv2 | X Cengage + entActivity.do?locator-assignment-take 0 How many amperes are required to deposit 0.291 grams of magnesium metal in 213 seconds, from a solution that contains Mg²+ ions. 2+ A Submit Answer Retry Entire Group 9 more group attempts remaining a 68°F Et OFE 1:37 PM 5/27/2022
- The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? OA. Solution A: 0.123 Solution B: 0.463 O B. Solution A: 0.463 Solution B: 0.234 O C. Solution A: 0.123 Solution B: 0.234 O D. Solution A: 0.234 Solution B: 0.463The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? A. Solution A: 0.123 Solution B: 0.463 B. Solution A: 0.463 Solution B: 0.234 C. Solution A: 0.123 Solution B: 0.234 D. Solution A: 0.234 Solution B: 0.463The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with D water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. Which of the following technique can be used to determine the amount of mercury in the undiluted sample of river water? O A. IR spectroscopy O B. Cold vapor atomic absorption OC. Hydride generation atomic absorption OD. Electrothermal atomic absorption
- Measure the mass of 0.400g of Co(NO3)2 + 6H2O and dissolve it in 15mL of distilled or deionized water using a clean beaker Then while using a graduated cylinder, measure out 10.0mL of a prepared 0.10-M Na3PO4 soultion. Determine which compound Na3PO4 or Co(NO3)2 *6H2O will be the limliting reagent. Then detrimine the theiretical yeildA 0.53 g sample containing KBr (MW=119) is dissolved in 50 mL of distilled water. Titrating with 0.04614 N AgNO3 requires 28.5 mL to reach the endpoint. Calculate the %w/w KBr in the sample. (Round-off your answer to 2-decimal places) Answer = ____%Which method of analysis generally is the faster method, gravimetric or volumetric? Why is that?
