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How much 6.01 M NaOH must be added to 620.0 mL of a buffer that is 0.0195 M acetic acid and 0.0230 M sodium acetate to raise the pH to 5.75?
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- A chemistry graduate student is given 500. mL of a 1.80M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K,= 4.9 x 10 – 10 What mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH =9.70? You may assume that the volume of the solution doesn't change when the KCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. 国 国 回A chemistry graduate student is given 450. mL of a 1.70M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K,= 4.9 × 10 ". What mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH = 8.97? You may assume that the volume of the solution doesn't change when the KCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.A chemistry graduate student is given 100. mL of a 0.90M hydrocyanic acid (HCN) solution. Hydrocyanic acid is a weak acid with K,=4.9 × 10 10 What mass of KCN should the student dissolve in the HCN solution to turn it into a buffer with pH = 8.97? You may assume that the volume of the solution doesn't change when the KCN is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
- A chemistry graduate student is given 300. mL of a 1.70 M pyridine (C,H,N) solution. Pyridine is a weak base with K,= 1.7 × 10. What mass of C,H,NHB1 should the student dissolve in the C,H,N solution to turn it into a buffer with pH = 4.87? You may assume that the volume of the solution doesn't change when the C,H,NHB1 is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.A chemistry graduate student is given 500. mL of a 1.50M chlorous acid (HClO₂) solution. Chlorous acid is a weak acid with K=1.1 × 10 KClO₂ should the student dissolve in the HClO₂ solution to turn it into a buffer with pH = 1.87? You may assume that the volume of the solution doesn't change when the KClO₂ is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. 1 85°F Explanation Partly sunny 3 Check S x10 X с % 5 T F6 Q Search F7 & L 1 F8 a * O F9 F10 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Acces % Co 楽- F11 *+ F12 PrtSc W + What mass of Insert ^ Delete BackspaceA chemistry graduate student is given 125. mL of a 1.60 M dimethylamine ((CH,) NH) solution. Dimethylamine is a weak base with K; = 5.4 × 10¯*. What mass of (CH,) NH,Cl should the student dissolve in the (CH, NH solution to turn it into a buffer with pH = 10.46? You may assume that the volume of the solution doesn't change when the (CH, NH,Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.
- 6A chemistry graduate student is given 250. mL of a 1.40M ammonia (NH3) solution. Ammonia is a weak base with K-1.8x10 should the student dissolve in the NH3 solution to turn it into a buffer with pH = 9.17? What mass of NH, Br You may assume that the volume of the solution doesn't change when the NH4Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. ?In a titration of 41.34 mL of 0.3483 M ammonia with 0.3483 M aqueous nitric acid, what is the pH of the solution when 41.34 mL of the acid have been added?
- A chemistry graduate student is given 500. mL of a 0.40 M ammonia (NH3) solution. Ammonia is a weak base with Kb=1.8x 10^-5 . What mass of NH4C1 should the student dissolve in the NH3 solution to turn it into a buffer with pH = 8.85? You may assume that the volume of the solution doesn't change when the NH, C1 is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.Consider a flask containing 25.00 mL of 0.100M sodium benzoate (NaC, H5C00). This is titrated with a 0.110 M nitric acid solution from a burette. Given: K, of C,H;co0" is 1.6 x 10-10. Determine the pH of the solution in the flask after 32.00 mL of the acid has been added? You must show any reaction equation(s) that you may think are necessary. Determine the pH of the solution in the flask at the half-way point of the titration.A buffer is formed by adding 1.0 mol of trimethylamine, (CH3)3N, and 1.0 mol of trimethylammonium, (CH3)3NH", in a 1.0 L container. If a 10.0 mL sample of this buffer is diluted to 1000 mL with water, what is the pH of the diluted buffer? For trimethylamine, K, = 6.4 x 105 !3! Insert your answer in decimal notation rounded to 2 decimal digits. Answer: Enter Value
