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- 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.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.GW 18b 1. A 20.0 mL sample of a 0.240 M hydrofluoric acid (HF) solution is titrated with 0.200 M NaOH. Determine: (a) pH of the acid solution before any base is added; (b) volume (in mL) of base needed to get to the equivalence point; (c) pH halfway to equivalence point; (d) pH at equivalence point; (e) pH when 0.100 mL NaOH is added beyond the equivalence point. (K₂ of HF = 7.1 × 104)
- A 1.00 liter solution contains 0.60 moles nitrous acid and 0.46 moles potassium nitrite .If 0.23 moles of perchloric 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 perchloric acid.) A. The number of moles of HNO2 will increase. B. The number of moles of NO2- will remain the same. C. The equilibrium concentration of H3O+ will remain the same. D. The pH will increase. E. The ratio of [HNO2] / [NO2-] will increase.12. The following quantities of salts were added to a volume of water to make 1 liter of solution: 1 x 10-2 moles NaCl 2 x 10-2 moles CaCl, 2 x 10-2 moles BaCl, (a) What is the ionic strength of the solution? (b) A small amount of phosphate salt is added to the same solution with negligible change in ionic strength. Given K = 10-7.2 for the reaction H,PO, = H+ + HPO,?- Calculate (H*][HPO,2-1/[H,PO,"), called °K, using the Güntelberg ap- proximation of the DeBye-Hückel law. (c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same solution if its activity is 10-3 M and its concentration is 9.5 x 10 4 M.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] /…
- What are the acceptable levels of chloride in boiler water?2. Using the procedure described in this module, a student determined the percent KHP in an impure sample of KHP. A 3.150-g sample of impure KHP required 41.50 mL of 0.1352M NaOH solution for titration. (a) Calculate the number of moles of NaOH required for the titration. (b) Calculate the number of moles of KHP present in the impure sample of KHP. (c) Calculate the number of grams of KHP present in the impure sample. (d) Calculate the percent of KHP in the impure sample, using Equation 8. Equation 8: percent KHP in the impure sample, % = ( mass of KHP in the sample,g/ mass of sample analyzed, g) (100%)Each row of the table below describes an aqueous solution at 25 °C. The second column of the table shows the initial components of the solution. • Use the checkboxes in the third column to explain the type of the initial solution. The fourth column describes a change in the solution. • Use the fifth column to predict how the change in the solution will change its pH. initial type solution initial components (check all that apply) O acidic A B с D H₂O H₂O, KOH H₂O H₂O, KOH basic neutral acidic basic neutral acidic basic neutral acidic basic ☐ neutral 00 change add NaC104 add KC1 add NaOH add HCl effect of change on pH (check one) O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same O pH higher O pH lower O pH the same ? olo Ar
- 35 of 44 > A monoprotic weak acid, HA, dissociates in water according to the reaction HA(aq) + H,O(1) = H,O*(aq) + A (aq) The equilibrium concentrations of the reactants and products are (HAJ = 0.270 M. [H,O*] = 3.00 x 10 M, and |A] = 3.00 x 10 M. Calculate the K, value for the acid HA. K, =3. For this problem, you may ignore the basicity of phosphate ion, PO. Strontium phosphate (molar mass 452.81 g/mol) is a salt that is sparingly soluble in water. Strontium acetate is considered a soluble salt in water. a. Write the balanced dissolution reaction equation of strontium phosphate. Hint: you will first need to determine the formula of the compound (this is identical to 2f) b. Write the balanced dissolution reaction equation strontium acetate. Hint: you will first need to determine the formula of the compound c. The solubility of strontium phosphate in water is 0.140 mg per liter. What is the Kip for strontium phosphate? Give your answer with 3 sig figs.AV 4. What specific effect, if any, would each of the errors below have on the calculated concentration of acetic acid? Explain your answer for each case. a. forgetting to initially rinse a wet burette with sodium hydroxide. b. not clearing a large air bubble in the tip of the burette. 5. Why did the addition of water to the flask not affect the determination of the amount concentration of acetic acid in vinegar? Cop 144