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- A series of solutions containing NaOH, Na.CO, and NaHCO, alone or in compatible combination, was titrated with o.1202 needed to titrate 25.00-mL portions of each solution to (1) a phenolphthalein and (2) a bromocresol green end point. Use this information to deduce the composition of the solutions. In addition, calculate the mass in milligrams of each solute per milliliter of solution. M HCI. Tabulated below are the volumes of acid (2) (1) (а) 22.42 (Ъ) 15.67 (c) 29.64 (d) 16.12 (е) о.00 22.44 42.13 36.42 32.23 33.333One day it was discovered that the waters of the lake were dead, estimated to be polluted Hg. How do you analyze whether it is true that the cause of death of this fish is due to the presence of mercury? What you would do as an analytic see this incident. Some standard solutions with concentrations of 2 ppm, 4 ppm, 6 ppm, 8 ppm and 10 ppm have absorbants of 0.1 each; 0,3 ; 0,5 ; 0,7 ; 0.9. Determine what the concentration of the sample if analyzed has absorbants of 0.32 and and 0.025. Explain how you analyzed it. A student wants to do a laboratory practicum by bringing students. In practicum you need sulfuric acid with a concentration of 0.1 N. While in laboratory there is sulfuric acid pa with a density of 1.84 gr / ml and 96 % w / w. Explain how you took the steps so that a 0.1 N sulfuric acid solution is available during practicumMISSED THIS? Read Section 18.6 (Pages 823-826); Watch IWE 18.12. Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the solution on the left. 9.0x10-2 M Cala; K2SO4 Express your answer using two significant figures. [K₂SO4]= ΜΕ ΑΣΦ Submit Request Answer Part C 1.7x103 M AgNO3; RbCl Express your answer using two significant figures. [RbCl] ΜΕ ΑΣΦ Submit Request Answer M M
- In a test tube with 0.3 mL of Aniline, 5 mL of 10% NaOH, 0.4 mL of benzene sulfonyl chloride. Add a few drops of 4M KOH to make sure it is alkaline and use a litmus paper. Let it stand for 10 minutes. Pour 6M HCl dropwise until it acidify. Explain what happens to the mixture before and after adding HCl. If a precipitate is formed, collect it by filtration or decantation. Test for solubility of the precipitate in 3 mL of 2.5M NaOH. Heat to 50 OC. Shake the tube well for 3 minutes. Explain what happens to the mixture after adding NAOH. Before adding HCl After adding HCl After adding NaOHCalculate the molar solubility of SrC2O4 in a solution that has a fixed H3O+ concentration of (Ksp (SrC204) = 5.0 × 108, K₁ (H2C2O4) = 5.60 x 102, K2(H2C2O4) = 5.42 × 10-5) a. 8.0 × 10-6 M. Molar solubility= M b. 8.0 × 107 M. Molar solubility = c. 8.0 x 109 M. Molar solubility = d. 8.0 x 10-11 M. Molar solubility = M M Mpure water MISSED THIS? Read Section 18.5 (Pages 817 - 822) . Express your answer in moles per liter to three significant figures. • View Available Hint(s) Calculate the molar solubility of CuX (for which = 1.27 x 10-36) in each of the following. Ksp = ? S = M Submit Part B 0.25 M CuCl2 Express your answer in moles per liter to two significant figures. • View Available Hint(s) ? S = M Submit Part C 0.23 M Na2X Express your answer in moles per liter to two significant figures. • View Available Hint(s) ΑΣφ ? S = M
- Calculations for Acetate Buffer Solutions 2. Molarity of sodium acetate in acetate buffer. 2. Calucate the moles of acetic acid in 250.0 mL acetate buffer (below is the data to answer the answer) Deionized water Acetate Buffer Ammonia Buffer pH of solution 6.62 4.59 9.49 Ph of solution after addition of 1 mL of 0.6 M NaOH 12.41 4.71 9.50 pH of solution after addition of 1 mL of 0.6 M HCl 1.38 3.87 9.24 Preparation of Buffer solutions Mass of sodium acetate in acetate buffer ~ 1.1981 Volume of 3.0 M acetic acid in acetate buffrer ~ 3.81 Mass of ammonium chloride ~ 1.2721 Volume of 5.0 M NH4OH ~ 6.00 (both questions go together... thanks!)A mixture of 500.0 mg acid A and 250.0 mg acid B is titrated with 0.1150 N NaOH. The endpoint is overstepped on the addition of 45.30 mL of the base. The solution is backtitrated using 1.40 mL of 0.1234 N HCl solution. If the equivalent weight of A is thrice the equivalent mass of B, calculate the equivalent weights of A and B.1. You will use 0.5mM PNPP, 0.2M Tris-HCl, and 1mM P; stock solutions to prepare two sets of five samples (Sets A and B), each with varying P; concentrations. The PNPP concentration for all samples in Set A will be 0.05mM; and 0.150mM for all samples in Set B. Fill out the tables below and use them to prepare your samples. Be aware of the following: • Prepare the samples directly in cuvettes. Prepare one sample at a time to minimize exposing PNPP to air. You can prepare the next sample while the current one is being measured. • Each sample before adding enzyme (i.e., the cuvette only contains PNPP, Pi, and Tris-HCI) is its own blank. In other words, you add the appropriate amounts of PNPP, Pi, and Tris- HCI to a cuvette, press "Measure Blank", then add 100μL of AP to the same cuvette, mix, and press "Measure Sample". • You must blank the instrument (before adding the enzyme) each time you prepare a new sample. Table 1. Sample Set A (PNPP concentration = 0.05mM) Final [Pi] (μM) Vol of…
- Calculate the pH at the following points for the titration of 50.00 mL of 0.0100 mol L-1 H2SO4 with 0.0100 mol L-1 NaOH standard solution.Vbase = 0.0; 10.0; 20.0; 25.0; 25.5; 40.0; 50.0 and 100.0.Plot a graph of pH versus Vbase.Perform the same procedure for H2SO4 and 0.01 mol L-1 NaOH concentrations.Generate the titration curves for the two solutions, compare them and justify.I made some titrations and the calculated molarity of HCI was 0.096, 0.097 and 0.098. The nomical concentrsrion of HCl is 0.1. How can I explain my results by comparing it to the nominal concentration if my confidence intervals don't include the nominal concentration?In a test tube with 0.3 mL of N-methylaniline, 5 mL of 10% NaOH, 0.4 mL of benzene sulfonyl chloride. Add a few drops of 4M KOH to make sure it is alkaline and use a litmus paper. Let it stand for 10 minutes. Pour 6M HCl dropwise until it acidify. Explain what happens to the mixture before and after adding HCl. If a precipitate is formed, collect it by filtration or decantation. Test for solubility of the precipitate in 3 mL of 2.5M NaOH. Heat to 50 OC. Shake the tube well for 3 minutes. Explain what happens to the mixture after adding NAOH. Before adding HCl After adding HCl After adding NaOH