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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 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.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
- A chemistry graduate student is given 125. mL of a 0.30M dimethylamine ((CH,) NH) solution. Dimethylamine is a weak base with K,= 5.4 × 10 4 What mass of (CH,) NH,Cl should the student dissolve in the (CH,) NH solution to 2 2 turn it into a buffer with pH = 10.65? 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.A chemistry graduate student is given 300. mL of a 1.60M pyridine (C H,N) solution. Pyridine is a weak base with K,=1.7 × 10 What mass of CH,NHC1 should the student dissolve in the CH,N solution to turn it into a buffer with pH = 5.16? You may assume that the volume of the solution doesn't change when the CH,NHCI 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 0.80M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid with K=1.8 × 10. What mass of KCH,CO, should the student dissolve in the HCH,co, solution to turn it into a buffer with pH = 4.26? olo You may assume that the volume of the solution doesn't change when the KCH,CO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. Ar
