HL2 gram of NaRcezand Natteo, containing impurties is dissolved and tityated with oSN Hel with phenolphthalein. colourless after addition{5 m) of aeid- Melhyt orange is then-added and 22-ontof, acid regaived tochange the of this indicator what is the peconly Nazcoz and Na Heoz in the Sample ? Sampleof an impure mixture of _ as indicator, thre sohution Cüras
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- A 3.00 mL aliquot of 0.001 M NaSCN is diluted to 25.0 mL with 0.1 M HNO3. How many moles of SCN- are present?A 0.4671 g sample containg NaHCO₃(Mwt=84.01mg/mmol) was dissolved and titrated with 0.1067 M HCl requiring 40.72 ml, find the percentage of NaHCO₃, in the sample0.890 g KIO3 was dissolved to give a 80.00 mL Iodate solution. 35.00 mL aliquot reactedwith the iodide to form triiodide. The liberated triiodide was titrated and consumed 11.65 mL of theS2O32- solution to reach endpoint. Calculate the concentration in molarity of the Na2S2O3solution.
- If 25 mL of 0.05 N NaOH required 30 mL of sulfuric acidfor titration. What is the normality of the acid?A 250.0-mg sample of an organic weak acid is dissolved in an appropriate solvent and titrated with 0.0556 M NaOH, requiring 32.58 mL to reach the end point. Determine the compound’s equivalent weight.A mass of 3.3214 g of sodium bi carbonate was dissolved and and diluted to 250,00 ml of aqueous solution .A 20.550X mL of sodium bicarbonate was used to neutralise 25.00mL of H2SO4solution. Calculate the molar concentration of H2SO4 SOLUTION
- What is the percentage of total acid expressed as acetic acid (CH3COOH) in a sample of vinegar if 3.000 g of the vinegar require 20.50 mL of 0.1150 N KOH solution for an end point with phenolphthalein indicator?Calculate the volume in milliliters of 0.368 M KOH necessary to titrate 0.0209 moles of acetic acid (HOAc, HC2H3O2) to a phenolphthalein end-point. Report the answer with a precision of two decimal places.You are the manager of a chemical stockroom, and find a bottle containing approximately one liter of aclear and colorless solution of unknown identity and concentration. Your only clue to its identity is thatit was found between bottles of silver fluoride and sodium fluoride, so it is likely an aqueous solution ofone of those two compounds. You will need to develop a procedure to determine the following:a) The identity of the unknown solutionb) The concentration of the unknown solutionWrite out a precise procedure, which includes all glassware, reagents, and steps. You will also need towrite the calculations that you would need to determine the concentration of the solution. Assume thatyou have access to any reagent you might need. You may also assume that you have access to commonlaboratory equipment. You observed some examples of laboratory equipment within the VirtualChemistry Laboratory simulations. You may visit the virtual lab at chemcollective.org to refamiliarizeyourself with…
- what is the balance equation wirh physical sates of butanoic acid and potassium butanoate as buffer solution.4) A 25.00-mL sample of vinegar is diluted with deionized to 100.0 mL. Then a 10.00-mL aliquot (portion) of the dilute vinegar solutionis titrated with 0.1055 M NaOH solution using phenolphthalein as theindicator. (a) If 19.60 mL of the base solution is required to reach the end-point, calculate the molar concentration of acetic in dilute vinegar solution. (b) What is the molar concentration of acetic acid in the original (undiluted) vinegar? The acid-base reaction occurs as follows: HC2H3O2(aq) + NaOH(aq) --> H2O(l) + NaC2H3O2(aq)The following statements are true, EXCEPT: (a) The purpose of a titration is to determine the concentration of the analyte solution. (b) The role of an indicator is to help the titrant and analyte react successfully. (c) The buret is used for delivering increments of the titrant solution. (d) The purpose of washing the buret with water is to help see the color of indicator better. Choices: I and III II and IV I and II III and IV