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- How many grams of Ba(103)2 (487 g/mol) can be dissolved in 400 mL of water at 25°C. (Ksp of Ba(103)2 = 1.57 x 10-9) Ba(10s)2 Ba2* + 2103 O 0.926 g O 0.221 g O 0.122 g O 0.143 g O 0.298 gWhat is the concentration of a standardized HCl solution that required 50.78 mL of HCl to titrate 0.7682 g of a primary standard Na2CO3? Na2CO3 + 2HCl --> H2CO3 + 2NaCl Na2CO3 = 105.99 g/mol ROUND OFF FINAL ANSWER TO FOUR (4) SIG FIGS.3:361 ull LTE O Send a chat What is the molarity of potassium ions in a 0.122 M K,CrO, solution? STARTING AMOUNT ADD FACTOR DELETE ANSWER RESET *( ) げ 2 155.10 0.122 6.022 × 1023 0.488 39.10 116 1 0.244 0.0305 4 0.0610
- Materials/Chemicals: Volumetric flasks Beakers Serologic pipetters Aspirators Vials/test tubes Cone. H3PO4 (85% w/w, sp gr. 1.70, MM 98) Cone. HCL (37.3% w/w sp. Gr. 1.18, MM 36) Glacial acetic acid (99.7% ww, sp gr. 1.05, MM 60) NaOH pellets NaH2PO4 Na2HPO4 Acid-base indicators: Bromophenol Blue Bromocresol green Phenol red Methyl red Methyl orange Phenolphthalein Thymol Blue pH paper pH meter Weighing balance For chemicals, refer from the template below. Research the chemicals to be used especially those that are new to you and write down the information needed. Name of Chemical Molec. Weight (g/mol) Melting point Boiling point Density (g/mL) General properties Methodolody: (Include a short summary of the overall experimental plan you are going to run. You may use flow chart or bullet form for this part. Sketches of any experimental set-ups used in the experiment or the workup procedures). Preparation of buffers Prepare 250ml of the…Oxalic acid ionizes in two stages in aqueous solution: H2C2O4(aq) + H2O(€ )2H;0* (aq) + HC2O4 (aq) Kal = 5.9 × 10² HC,O, (aq) + H,O(e)2H;0*(aq) + C20?¯(aq) K22 = 6.4 × 10-5 Calculate the equilibrium concentrations of C¿O²¯, HC,O, H,C,O4, and OH- in a 0.10 M solution of sodium oxalate (Na,C¿O4).7:25 ◄ Search 1 Balance the following chemical equation (if necessary): 2- 3c₂²- Question 2 of 20 + Ca (C₂H3O₂)2 (aq) + Na₂CO3(aq) → Ca CO3(s) + NaC₂H₂O₂ (aq) (s) Reset 2 3 4 5 6 7 8 (1) x H₂O (g) 个 5G 85 Submit Tap here or pull up for additional resources 9 (aq) NaC₂H3O₂ Ca(C₂H3O₂) Na₂CO3 CaCO3 O
- 3. Which of the following statement/s is/are correct? 1. 6.00 N H2CO3 is equivalent to 3.00M H2CO II. 5.29 % (w/v) H2SO4 is equivalent to 0.539 N HSO4 II. 1.15 N Mg(OH)2 is equivalent to 16.3 g Mg(OH)2 in 500 ml solution. (MH2504 98.086 g/mol; Miacos 62.026 g/mol; MOH2 58.326 g/mol) O l and IlI O l only O l and II Oland IMolar concentration of the dye stock solution: 2.52e-5 mol/L Solutions(Dilutions) Absorbance (A)(a.u.) 1 0.086 2 0.179 3 0.366 4 0.532 Solution 1: 1.00 mL of Blue#1 Stock Solution and 19.00 mL of distilled water Solution 2: 2.00 mL of Blue#1 Stock Solution and 18.00 mL of distilled water Solution 3: 4.00 mL of Blue#1 Stock Solution and 16.00 mL of distilled water Solution 4: 8.00 mL of Blue#1 Stock Solution and 12.00 mL of distilled water Using linear regression determine the absorbance/concentration relationship for the dye. [dye] = x A I got 0.00001920x but the answer is wrong can someone please help?Concentration of Reagents (NH4)2S2O8 KI Na2S2O3 0.25 M 0.22 M 0.19 M Volumes of Solutions S₂082 (mL) Starch soln (mL) KNO3 (mL) EDTA soln (mL) KI (mL) S₂O32- (mL) x 5 9.7 0.9 26.4 0.5 9.9 1.1 Using the above data determine the concentration of I at the moment the reaction begins. HINT: This is a mixing problem. Determine the total number of moles of I and divide this amount by the total volume (in L). Be careful... If you go back and try this exercise again the values will change. Read the question carefully! Answer:
- How many grams of Ba(103)2 (487 g/mol) can be dissolved in 500 ml of water at 25°C. (Ksp of Ba(103)2 1.57x 10-9) Ba(103)2 Ba2+ + 2103 O 0.178 g O 0.122 g O 0.221 g O 0.926 g O 0.298 gWhat is the missing reactant? Select one: A. I B. III C. iv OD ii CH-8-001 MgCl LDA 78 C THE ILL IV ? ())-01-2-0031,Calculate the solubility at 25 °C of PBCO, in pure water and in a 0.0020 M Pb (NO,), solution. Round both of your answers to 2 significant digits. solubility in pure water: solubility in 0.0020 M Pb(NO3)2 x10 solution: ? Dlo