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- Calculate how many mEq of sodium (MW 23) are present in an admixture that is prepared by adding a 10 milliliter vial of NaCl (2.5 mEq/mL) to 500 milliliters of 1/2 normal saline. (MW NaCl 58.4; MW CL 35.4).Q12 chapter 15 titrations Solve asap hundred percent correct solution neededThe total cation content of natural water is often determined by exchanging the cations for hydrogen ions on a strong acid ion-exchange resin. A 25.00 mL sample of a natural water was diluted to 100.00 ML with distilled water, and 2.06 g of a cation - exchange resin was added. After stirring, the mixture was filtered and the solid remaining on the filter paper was washed with three 15.00 mL portions of water. The filtrate and washings required 16.30 mL of 0.0282 M NaOH to give a bromocresol green end point. a) Calculate the number of millimoles of cation present in exactly 1.00 L of sample. b ) Report the results in terms of milligrams of CaCO3 per liter. Only typed solution.
- 1. Mixing a solution of higher concentration with an identical solution of lesser concentration 2. Color of the end point in the standardization of NaOH if methyl orange is used 3. Errors due to the decrease of voltage of a battery operated power supply is an example of ___Normality is same as Molarity for sodium hydroxide and normal = molar (for NaOH) Normality of sodium hydroxide = 0.10395N (normal) or Molarity of NaOH = 0.10395M (molar) Volume of NaOH consumed during the titration = 21.87 mL Mol wt of Naproxen = 230.26 g/mol Weight of Naproxen ds (i.e., sample) = 0.534g Calculate the % Purity (dried-basis) of Naproxen ds, given that the LOD results for Naproxen = 1.0% a 97.0 b 98.0 c 98.5 d 99.0 e 99.5 f none of the other answers.Starting a titration, the technician requires 200mL of a 0.22% (w/v) solution of citric acid, anhydrous. The technician should weigh out 4.4g of this compound. (True or False) Could you explain how you got to the answer.
- Suppose you are given 0.0856ppm to be the concentration of dissolved lead found in pond water after dilution factor of 1:100 in 100ml volumetric flask and the other sample is diluted at the dilution factor of 1:2 and the concentration is 2.14ppm. How would you comment on the amount of lead in pond waterA vinegar sample of 28 mL was diluted with distilled water to a 250-mL volume. 25 mL portion of this solution was directly titrated with standard 0.01 mol/L NaOH solution. The consumption was found as 27.1 mL. Find the concentration (mol/L) of acetic acid in vinegar sample.A surface ocean current has a flow rate of 6.9 x 107 m3 per second. The current is 105 km wide by 940 m deep. What is the velocity of this current?
- 0.2061 grams of an unknown organic acid was dissolved in about 50 mL of water in a 250 mL Erlenmeyer flask and titrated against 0.1000 M NaOH solution using bromothymol blue indicator. 15.56 mL of titrant was used to achieve end point. Calculate the Neutralization Equivalent. Write answer with two decimal places only. No units please.A student measured the mass of an empty micropicnometer to be 2.000g. A student places 0.500mL of citric acid solution into a micropicnometer. The student reweighed the micropicnometer and found the mass of the citric acid solution and micropicnometer to be 2.525g. A student titrates 0.101mL of citric acid solution using the standardized 0.1M solution (use the exact concentration calculated from the previous titration problem). The sample required 0.819mL of NaOH solution to reach the end point. Given the following chemical equation. NaOH + H3C6H5O7 → Na+ + H2O + C6H5O73- Given the above information. Calculate the mass% of citric acid in the citric acid solutionA student measured the mass of an empty micropicnometer to be 2.000g. A student places 0.500mL of citric acid solution into a micropicnometer. The student reweighed the micropicnometer and found the mass of the citric acid solution and micropicnometer to be 2.525g. A student titrates 0.101mL of citric acid solution using the standardized 0.1M solution (use the exact concentration calculated from the previous titration problem). The sample required 0.819mL of NaOH solution to reach the end point. Given the following chemical equation. NaOH + H3C6H5O7 → Na+ + H2O + C6H5O73- Given the above information. Calculate the mass of citric acid in the 0.101mL citric acid solution. Given the above information. Calculate the total mass of the 0.101mL citric acid solution.