This type of analysis implies that the constituent determined was present in very, very low concentration. a. Macro analysis b. Semi-macro analysis c. Micro analysis
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- A 0.250-M sodium sulfate solution is added to a 0.200-M barium nitrate solution and 0.700 g barium sulfate precipitates. Write the balanced equation for this reaction. Calculate the minimum volume of barium nitrate solution that was used. Calculate the minimum volume of sodium sulfate needed to precipitate 0.700 g barium sulfate. Assume 100% yield.44. In which solution will 0.0010 M AgNO3 form a precipitate? a. 2.0x10-7M NaCl (Ksp of AgCl=1.8x10-10) b. 9.1x10-9 M NaI (Ksp of AgI=8.3x10-17) c. 7.1x10-7 M NaBr (Ksp of AgBr=5.0x10-13) d. 7.4x10-7 M NaBrO4 (Ksp of AgBrO4=5.5x10-13)11. During titration, what do we call a standard solution added to note the changes in the appearance and disappearance of color and turbidity?A. standard solutionB. precipitating agentC. chelating agentD. indicator12. It refers to the molar concentration of a particular species in a solution at equilibrium. A. Molar Analytical ConcentrationB. Molar Equilibrium concentrationC. Molar v’ant Hoff concentrationD. Molar Solubility concentration13. Which of the following statements is true about a chemical concentration labelling which says 65% colchicine (w/v) in 1000 mL mixture?A. it means that for every 100 mL of the mixture, there exists 65 g of the active ingredientB. it means that for every 1000 mL of the mixture, there exists 65 g of the active ingredientC. it means that for every 100 g of the mixture, there exists 65 g of the active ingredientD. it means that for every 1000 g of the mixture, there exists 65 mL of the active ingredient14. What is the molar concentration of Zn2+ in a…
- In precipitation gravimetry, the particle size is influenced by (Tick all possible answer) A. pH of the solution B. temperature C. concentration of the reacting solutions D. use of non-electrolyte solutions13. What is the molar solubility of Pbl2 in an aqueous solution containing 0.15 M Nal? The Ksp of Pblz is 1.4x10-8. a. 6.2x107 M b. 9.3x10-8 M 4.7x10-8 M d. 1.6x107 M e. 2.5x107 M Only typedc solutionAA Learning Learning prod03-cnow-owl.cengagenow.com Login Learning × Online tea... y dr. marlow... Member L... 1req 1req Use the References to access important values if needed for this question. The Solubility Product Constant for silver bromide is 3.3 x 10-13 Solid ammonium bromide is slowly added to 75.0 mL of a 0.0663 M silver acetate solution. The concentration of bromide ion required to just initiate precipitation is M.
- A 1.067g sample of magnesium oxide of 84.736% were treated with 50mL of 1.017 N Sulfuric Acid, and a 5.195mL volume of sodium hydroxide is required in the back titration. 1. What is the equivalent weight consumed by the acidic titrant? A. 5.281 g-meq B. 55.150 g-meq C. 5.723 g-meq D. 50.850 g-meq 2. What is the difference of milliequivalent weight consumed in the reaction? A. 45.127g-meq B. 56.573g-meq C. 50.850g-meq D. 55.150g-meq 3. What is the amount (in mg) of the analyte that is equivalent to 1 milliliter of the tirant at its equivalence point? A. 22.060mg B. 40.680mg C. 44.12mg D. 20.340mgA silver nitrate soluti on contains 14.77 g of primary standard AGNO3 , in 1.00 L what volume of this solution is needed toreact completely with 50.00 ml. of 0.01808 M Na2S. 1. O10.40 ml. 2. O 20.79 ml. 6.10 ml. 4. O12.31 ml. 5. O18.21 ml. 3.the solubility of silver sulfate in water is determined to be 570 mg/100mL based on the given chemical species and parameters contained in the problem, what type of titrimetry is involved? a. direct b. indirect c. residual
- 1. One of the methods of eliminating interferences, is by adding solvents to the solution in which components to be removed are soluble, which method is this? a. Complexation b. Extraction lon-exchange d. Precipitate С. 2. Which of the following properties of precipitates is desired in gravimetry? a. Large b. Pure С. Free of contaminants d. All of the choicesWhich of the following combination of two techniques will lead to the LOWEST yield in barium sulfate precipitate? a. 10 min digestion time, ordinary filter paper d. >10 min digestion time, ashless filter paper11. Tannins which present in tea leaves can be converted into water soluble salts by: a. Gentle shaking. B. Addition of CaCl. C. Addition of NaCl solution. d. Addition of NazCO.