A buffer solution was prepared by mixing 30.0 mL of 0.250 M HCSH303 (furoic acid) with 20.0 mL of 0.220 M NacsH3O3 (sodium furoate) and diluting to a total volume of 125 mL. The pH of the buffer solution is;
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- 2.60 g of sodium acetate, CH3COONa was dissolved in 150.0 mL ofwater, H2O. A solution of 0.025 M ethanoic acid, CH3COOH was addedinto the above salt solution. Calculate the pH of the mixed solution.A solution is prepared by adding 100 mL of 1.0 M HC,H,O,(aq) to 100 mL of 1.0 M NaC,H,O,(aq). The solution is stirred and its pH is measured to be 4.73. After 3 drops of 1.0 M HCl are added to the solution, the ph of the solution is measured and is still 4.73. Which of the following equations represents the chemical reaction that accounts for the fact that acid was added but there was no detectable change in pH? (A) H;O*(aq) + OH (aq) → 2 H,O(1) (B) H;O*(aq) + CI (aq) → HCI(g) + H,O(1) (C) H,O*(aq) + C,H,O, (aq) → HC,H,0,(aq) + H,0(1) (D) H;O*(aq) + HC,H,O,(aq) - H,C,H,0,*(aq) + H,O()2.50 g of sodium acetate, CH3COONa was dissolved in 150.0 mL of water, H2O. A solution of 0.025 M ethanoic acid, CH3COOH was added into the above salt solution. Calculate the pH of the mixed solution.
- A student added 1.78g of Ca(OH)2(9) to 0.250 L of 0.200 molL-1 HNO3(aq)- The mixture was carefully stirred until no further reaction occurred. Assuming that the total volume of the solution remains unchanged, calculate the pH of the resulting solution.The mixture of 100.0 mL of 0.100 M NaOH (aq) and 100.0 mL of 0.300 M CH3COOH (aq) will result in a buffer. (a) Explain why the resulting solution is a buffer. (b) What is the pH of this buffer?When using a 0.100 M HCl (aq) standard solution and measuring 50 ml of 0.100 M NH3 (aq), Find the pH under each of the following conditions. (a) (a) the initial state before adding the HCl(aq) standard solution; (b) (b) 40.0 ml of HCl(aq) standard solution is added. (c) (c) 50.0 ml of HCl(aq) standard solution is added. (d) (d) 50.2 ml of HCl(aq) standard solution is added.
- Calculate the pH of the resulting solution if 35.0 mL0.350 M HCl(aq) is added to 25.0 mL of 0.450 M NaOH(aq).Calculate the pH during the titration of 20.0 mL of 0.30 M HNO3(aq) with 0.30 M KOH after 19.24 mL of the base have been added.100 mL of 0.100 mol L–1 hydrochloric acid is mixed with 200 mL of 0.100 mol L–1 sodium hydroxide. What is the pH of the resulting solution?
- What volume of 0.500 M HNO2 should be added to 500 mL of 0.750 M KNO2, so that the pH of the resulting buffer is 3.23 .(a) Write the net ionic equation for the reaction that occurswhen a solution of hydrochloric acid (HCl) is mixed with asolution of sodium formate (NaCHO2). (b) Calculate theequilibrium constant for this reaction. (c) Calculate theequilibrium concentrations of Na+, Cl-, H+, CHO2-, andHCHO2 when 50.0 mL of 0.15 M HCl is mixed with 50.0 mLof 0.15 M NaCHO2.1. 0.646 g of sample containing BaCl2.2H2O (244.26 g/mol) was dissolved and enoughpotassium chromate was added. After filtering, the precipitate was dissolved in acid andenough KI was added and titrated with thiosulfate. Since 48.7 mL of 0.137 M thiosulfateis used for this, what is the percentage of BaCl2.2H2O in the sample?K2Cr2O7 + 7H2SO4 + 6KI 4K2SO4 + Cr2(SO4)3 + 7H2O + 3I2