A reagent of known concentration that is often placed inside a buret titrant Chemicals are sold and classified based on their % purity. Arrange the following classifications according to increasing % purity. 1. Chemically pure (CP) II. Primary standard III. Reagent-grade a. l< ll
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- B. Weight of Na2SO4 Sample 0.3512 g C. Total Vol. of Precipitant (BaCl2) used WITH 1M BaCl2 PLEASE FIND THE calculated volume of BaCl2 precipitant will be calculated using this formula: NVBaCl2 = (weight of sample)(1000)(EW) V(ml)BaCl2 = (weight sample)(1000)N(EW).Q1: What is the density (g/ml) of a 3.6M Sulfuric acid solution that is 29% H,So, by mass (Mwt. = 98)? Q2: Fill the blanks with suitable answers 1: The is the thing being dissolved. ......... 2: The branches of quantitative analysis are and 3. The filterability of the precipitate depend on the of practices. Q3: Which one is correct? 1. Molality changes with temperatures. 2. Molality does not change with temperatures. 3. Molarity changes with temperatures. 4. Normality changes with temperatures. Q4: What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of FeS, =1194
- B. Determination of Total Acid Content in Commercial Vinegar Sample Brand of Sample: Trial 1 Trial 2 Trial 3 Volume of sample 10.00 mL Final reading - standard NaOH solution 25.63 mL Initial reading - standard NaOH 0.08 mL solution Volume consumed - standard 25.55 mL NaOH solution 0.3059 M Molarity of standard NaOH solution Total Acidity in Sample 4.69% Mean Total Acidity in Sample 4.69% BALANCED CHEMICAL EQUATION/S INVOLVED: COMPUTATIONS:5. From the stock solutions of 1.00-mol L acetic acid and 1.00-mol L of sodium acetate, six solutions were prepared with the acetic acid and acetate concentrations shown in the table below. The pk of acetic acid is 4.756. [Acetic acid). [Acetate). Final volume, Solutio mol L mol L ml A. 0.10 100 0.0000351 100 0.10 0.10 100 0.010 0.010 100 0.10 0.15 100 0.15 0.10 100 -1 Determine the volume of the stock solutions of 1.00-mol Lacetic acid and 1.00-mol L of sodium acetate needed to prepare the solutions. Write your answer in the table below. a. Vol. acetic acid, ml Vol. of acetate, ml Solution A b. Calculate for the initial pH of the solutions and write the pH in the table below. Solution Initial pH A Which solution(s) have the same pH? C.M req M #3 80 E D Solid barium chloride is slowly added to 75.0 mL of a 0.205 M sodium carbonate solution until the concentration of barium ion is 0.0440 M. The percent of carbonate ion remaining in solution is %. Submit Answer C $ 4 000 888 R F % 5 V [References Use the References to access important values if needed for this question. Retry Entire Group T Cengage Learning | Cengage Technical Support G 6 6 more group attempts remaining MacBook Pro B Y H & 7 U N 11 * +00 8 J 1 M ( - 9 K O ) 0 I 2 L P command Previous Email Instructor { + 11 [ Next Save and Exit 27 option ? 1 ] dele
- Which is a wrong statement? a. Washing the precipitate, removes absorbed impurities O b. In homogeneous precipitation the precipitating agent is added from within the solution O. Precipitation starts by neucleation in a supersaturated solution O d. Occlusion and inclusion impurities can be removed by recrystallization2 Trial 1: [4] Volume of NaOH, dispensed (mL) Trial 1: [5] Molar concentration of NaOH (mol/L) Trial 2: [4] Volume of NaOH, dispensed (mL) How Trial 2: [5] Molar concentration of NaOH (mol/L) Trial 3: [4] Volume of NaOH, dispensed (mL) Trial 3: [5] Molar concentration of NaOH (mol/L)What is the Mass pf Cl- found in the water sample (in grams)? %(w/w) Cl- in the water sample? Average %Cl- in water sample?
- Solubility data of a sample is given below: Solvent Solubility in Cold Solvent Solubility in Hot Solvent Toluene Insoluble Soluble Dichloromethane Insoluble Insoluble Methanol Soluble Soluble From the above list, which solvent is bes ited for recrystallization this sample? Select one: Toluene Dichloromethane Methanol O Cannot be determined.Part II: Titration of Vinegar with Standaralzed Naun Report Table AV.4: Part 2 Calculations. Data and Calculations for three trials Part II: Titration of Vinegar with Standardized auη Report Table AV.4: Part 2 Calculations Data and Calculations for three trials Table view List view Trial 1 Trial 2 Trial 3 Volume of Vinegar Titrated (mL) 10.00 10.00 10.00 Initial Buret Reading (mL) 4.00 13.20 23.10 Final Buret Reading (mL) 13.20 23.10 34.001 9.20. 10.10 10.90 Volume NaOH used (mL) Moles Acetic Acid (mol) Mass Acetic Acid (g) Mass Percent Acetic Acid (%)I need help on questions 2-7?