Which of the following is not a feature that primary standard substances should have. A. must be of high purity B. must be of low molecular weight C. must be stable in air D. must dissolve sufficiently in titration medium
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Which of the following is not a feature that primary standard substances should have.
A. must be of high purity
B. must be of low molecular weight
C. must be stable in air
D. must dissolve sufficiently in titration medium
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- Read and urete on the selection of a proper Indicator • What is an Indicator Chemistry Of work ? )u Factors which result in Indicator f an acıd/base Indicator (how does it Colour Chawge of an Indicator Cuhat is ?) range ranges of different lndicators Indicator which Indicafors reaction may be used for which Indicator • General rule for Cho.ce of an . Itow to determine range at which an Indicator whe of wHl Change colourFill in the blanks by writing the name of the definition: is a substance which is added to the reaction mixture and changes color at the equivalance point. O a Primary standard O b. titrant İndicator O d. analyteA 6.00-mL portion of an 8.00 M stock solution is to bediluted to 0.400 M. What will be the final volume afterdilution?
- In the deposition method, one of the conditions that must be met is…a. The precipitate has a high solubility or solubility productb. The precipitate formed must be quite difficult to dissolvec. The precipitate formed does not have to be quite pured. Free precipitate formA 0.4482 g sample of impure NaCN is titrated with 0.1018 M AgNO3 requiring 39.68 mL to reach the end point. Report the purity of the sample as %w/w NaCN. a. 61.13% b. 63.13% c. 62.31% d. 66.25%o/index.html?deploymentld%=55750828934189288909969212&eiSBN=9781305657571&snapshotld%32199898&id%3... ☆ IDTAP Q Search this cou Use the References to access important values if needed for this question. The concentration of H3ASO3 in a solution is determined by titration with a 0.1945 M Ce+ solution. The balanced net ionic equation for the reaction is: 2Ce*(aq) + H3ASO3(aq) + 5H2O(1) 2Ce*(aq) + H3ASO4(aq) + 2H3O*(aq) (a) If 19.83 mL of the 0.1945 M Ce** solution are needed to react completely with 30.00 mL of the H3ASO3 solution, what is the concentration of the H3ASO3 solution? M (b) Which of the two solutions was in the buret during the titration? (c) Suppose at the end of the titration, the solution containing the Ce³* ion is transferred to a volumetric flask and diluted to 300. mL. What is the concentration of Ce3+In the diluted solution? Submit Answer 5 question attempts remaining
- 2. (Properly complete the following sentence.) A titrant is ... a solution with known concentration that is delivered by a buret during a titration. ... the negative oxyanion containing titanium, TiO3". ... O... the point during an acid-base volumetric analysis where the indicator changes color. O... a powerful and evil dictator.2) You are tasked with determining the barium content of a sample containing barium nitrate mixed with rubidium nitrate. The sample is weighed, dissolved into 50.0mg water, and treated with xs 0.500M sodium sulfate. The acid fully ionizes in this experiment. A white precipitate forms which is washed, filtered, and weighed multiple times, according to the data given below: Mass of sample 0.425g Mass of thoroughly dried filter paper 1.462g Mass of precipitate+filter after 1st drying 1.755g Mass of precipitate+filter after 2nd drying 1.699g Mass of precipitate+filter after 3rd drying 1.698g A] for the chemical reaction that occurs forming the precipitate: (i) write the balanced net-ionic equation for the reaction (ii) explain why the net-ionic equation optimally represents the process2) You are tasked with determining the barium content of a sample containing barium nitrate mixed with rubidium nitrate. The sample is weighed, dissolved into 50.0mg water, and treated with xs 0.500M sodium sulfate. The acid fully ionizes in this experiment. A white precipitate forms which is washed, filtered, and weighed multiple times, according to the data given below: Mass of sample 0.425g Mass of thoroughly dried filter paper 1.462g Mass of precipitate+filter after 1st drying 1.755g Mass of precipitate+filter after 2nd drying 1.699g Mass of precipitate+filter after 3rd drying 1.698g
- In a precipitation process, inclusion can be avoided by: a. reprecipitation b. peptization c. digestion d. washing6. The phosphorus content in a 0.3004-g sample was precipitated as (NH4);PO4 .12M0O3 a slightly soluble precipitate. The precipitate was filtered, washed, and further redissolved in acid. The resulting solution was treated with an excess of Pb²* resulting in the formation of 0.3017 g of PbMoO4. Calculate the % w/w of P2Os.||What are/is the disadvantage(s) of using iodine solution as a titrant? A Iodine can sublime. B odine is not very soluble in water. C Iodine solution lacks stability and requires regular standardization. D All of the above
