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- a. A 1.00 liter solution contains 0.45 moles nitrous acid and 0.35 moles potassium nitrite .If 0.17 moles of hydroiodic acid are added to this system, indicate whether the following statements are true or false.(Assume that the volume does not change upon the addition of hydroiodic acid.) A. The number of moles of HNO2 will decrease. B. The number of moles of NO2- will decrease. C. The equilibrium concentration of H3O+ will remain the same. D. The pH will increase. E. The ratio of [HNO2] / [NO2-] will increase. b. A 1.00 liter solution contains 0.38 M ammonia and 0.49 M ammonium bromide. If 0.120 moles of barium hydroxide are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of barium hydroxide.) A. The number of moles of NH3 will decrease. B. The number of moles of NH4+ will decrease. C. The equilibrium concentration of H3O+ will increase. D. The pH will increase. E. The ratio of [NH3] /…4. You have a test tube containing a mixture of Ag+, Fe3+, and Ba2+. Make a diagram similar to Expt. 1 to separate the given mixture of cations. Include the correct reagents to be used to effectively isolate cations from each other.You have three known solutions: 1) Na,co, 2) Ваcl 3 ) ΚNO, Even though you know that you have these three solutions, you do not know which one is which because they are not labeled. Which one of the following reagents should you add to each solution to be able to accurately identify and label them? Select one: A. Cacl, X B. We need more than one of these reagents to be able to identify all three solutions С. NaOH D. HCI E. H,SO,
- 1. How do you prepare 500 mL of a ~0.10 M NaOH solution? What mass of NaOH(s) should you use? 2. If you wish to use 20 mL of 0.10 M NaOH to react fully with potassium hydrogen phthalate (KHP), what mass of KHP should you use in each titration trial?, g (formula for KHP is: C8H5KO4.)1. Do you always have to use a primary standard in the standardization of titrant? Why or why not?A student found two bottles of compounds with missing labels. The compounds are either Benzyl chloride or Bromobenzene. To figure out the contents of each bottle, the student put 2 drops of each compound into separate test tubes labeled X and Y and added 1 mL of a mixture of NaI and acetone to each tube. After 45 seconds, the student observed a white color precipitate in tube X, while there was no precipitate formed in tube Y. What compound (Benzyl chloride or Bromobenzene) does tube X contain? Why
- Calculate the percentage CH3COOH in a sample of vinegar from the following data.Sample = 15.00 g, NaOH used = 43.00 ml ; 0.600 N H2SO4 used for back titration =0.250 ml ; 1.00ml NaOH is equivalent to 0.0315 g H2C2O4. 2H2O.A 1.00 liter solution contains 0.52 moles hypochlorous acid and 0.40 moles potassium hypochlorite. If 0.20 moles of hydrobromic acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of hydrobromic acid.) A. The number of moles of HC1O will decrease. ⒸB. The number of moles of C10¯ will remain the same. C. The equilibrium concentration of H3O+ will decrease. ⒸD. The pH will remain the same. [HCIO] [C10¯] ⒸE. The ratio of will increase.2. Ksp for Pb(IO3)2 is 2.5 x 1013. What weight of Pb(IO3)2 will dissolve in 200 mL of water?
- A 1.00 liter solution contains 0.33 moles nitrous acid and 0.25 moles potassium nitrite . If 0.13 moles of hydrobromic acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of hydrobromic acid.) JA. The number of moles of HNO2 will remain the same. B. The number of moles of NO2 will decrease. |C. The equilibrium concentration of H30* will decrease. D. The pH will increase. E. The ratio of [HNO2] / [NO2] will remain the same.1. Commercial vinegar was titrated with NaOH solution to determine the content of acetic acid, CH3COOH. For 20.0 cm3 of the vinegar, 26.7 cm3of 0.60 mol dm-3 NaOH solution was required.What was the concentration of acetic acid in the vinegar if no other acid was present? (Thanks for your help) A. 0.45 mol dm-3B. 0.60 mol dm-3C. 0.80 mol dm-3D. 1.60 mol dm-3which compound listed below will dissolve best in H2O ? EXPLAIN your choice . A. CH2O B. CO2 C. O2