If 100 ml of a paracetamol preparation contains 20 ml of a sodium chloride (50% w/v) . What is the percent strength of that agent in the preparation?
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If 100 ml of a paracetamol preparation contains 20 ml of a sodium chloride (50% w/v) . What is the percent strength of that agent in the preparation?
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- A prednisolone solution contains 15 mg prednisolone per 10 mL. What is the percentage strength (w/v) of the prednisolone in this prescription? (Answer must be numeric; no units or commas; round the final answer to the nearest HUNDRETH.)You have a 10 mg/ml stock solution of ethidium bromide (EtBr) and need to dilute it to 0.2 micrograms/mL in gel running buffer and the gel itself. Your gel volume is 50 mL and you need 400 mL of the running buffer. How much of the concentrated stock solution do you put in the gel and the running buffer?D.If you have 1 mL of an eluate containing 1 M imidazole and you can use a dialysis cassette in 2 L of buffer with no imidazole, what will the concentration of imidazole be in the cassette after dialysis is complete? Show all work?
- 0.1500 g of an unknown sample was passed through a column of Amberlite IR-120(+) resin and titrated with 0.2050 M NaOH. If 9.75 mL of titrant was required to reach phenolphthalein endpoint, what is the molecular weight of the unknown substance?Water sample A has a turbidity reading of 555 NTU. If a 50 ppm standard has a turbidity reading of 50 NTU, what is the concentration of the analyte in A that causes the water to be turbid?25 mL of HCl was used. I need help with all 3 trials. Thank you!
- How does the SPF value of the sunscreen formulation change with the different concentrations of benzophenone-3? Explain.Calculate the percentage of Atropine in Belladonna powder using 10.7 g sample and adding 20 mL of 0.0225N H2SO4 and back titrated with 12.5 mL of 0.0295N NaOH. Each mL of 0.02N H2SO4 is equivalent to 5.788mg of Belladona alkaloids in terms of Atropine.How will you prepare standard solution of catechin (50, 100, 150, 200, 250 and 300 mg/L) scaled down to 50 mL?
- What is the effective buffer range for a buffer made with lactic acid (Ka = 1.42 x 10-4) and sodium lactate?With KD = 3.5, in a solution of 10 grams of aspirin in 80 mL of ether using two separate extractions using 65 mL of water per extraction, Calculate: 1. The amount of aspirin that would be extracted from the FIRST extraction. 2. The amount of aspirin that would be extracted from the SECOND extractionFollowing the monograph procedure, a 724-mg of aspirin (MW+180 g/mol) dissolved in 18.5 ml of cold neutralized alcohol. This solution was then initially titrated with 0.101 N sodium hydroxide solution, then later neutralized with 0.104 sulfuric acid. 1. What is the milliequivalent weight consumed by the acidic titrant? a. 1.5392 g-meq b. 2.0907 g-meq c. 1.4948 g-meq d. 2.1528 g-meq 2. What is the milliequivalent weight consumed by the basic titrant? a. 5.8656 g-meq b. 1.5392 g-meq c. 5.6964 g-meq d. 1.4948 g-meq 3. What is the difference of milliequivalent weight consumed in the reaction? a. -4.1572 g-meq b. 4.3708 g-meq c. 0.5515 g-meq d. 4.1572 g-meq