Nahco3 ka

• [DOC File]Chapter 17 Study Questions and Problems

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  c. sodium bicarbonate NaHCO3 acidic (HCO3- will give up H+) ... Need to look up the Ka for sulfurous acid in back of book Ka = 1.5 x 10-2 = = x = .1M pH = -log(.1) = 1. b. What is the concentration of sulfite ion in a 0.80 M solution of sulfurous acid? Same – most of the H+ came from the first dissociation ...

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• [DOCX File]15. Introduction To Buffers

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  0.01 M Sodium bicarbonate (NaHCO3) and 0.01 M Sodium carbonate (Na2CO3) 16.Chemists often characterize acids by their pKa. The pKa is defined as . pKa = –log(Ka) The Ka of each of the acids and bases used in the buffers in Model 1 are given below. Calculate the pKa for each and record them in the table below. acetic acid. CH3COOH (aq) ⇌ H+ ...

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• [DOC File]Unit IV Acid and Base Multiple Choice - Chemistry 30

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  B. NaHCO3. C. NaHSO4. D. NaHPO4. 32) The pH at which an indicator changes colour is known as its. A. standard point. B. transition point. C. equivalence point. D. stoichiometric point. 33) An indicator is blue at a pH of 12.0 and colourless at a pH of 1.0. Identify the indicator and determine its Ka …

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• [DOC File]MARKING SCHEME - Homework

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  Since Ka > Kb the solution is ACIDIC. The observed pH of 4.5 agrees with the ACIDIC prediction. (2) NaHCO3. i) NaHCO3 Na+ + ii) Na+ is a spectator. iii) + H2O + H3O+ ; Ka = 5.6 x 10-11 + H2O H2CO3 + OH– ; Kb = = 2.3 x 10–8. Since Kb > Ka the solution is BASIC. The observed pH of 10 agrees with the BASIC prediction. Page 4

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• [DOC File]type worksheet title here - St. Joseph High School

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  Feb 08, 2011 · 8. Determine the pH of a solution in which 1.00 mol H2CO3 (Ka = 4.2 x 10-7) and 1.00 mole NaHCO3 are dissolved in enough water to form 1.00 L of solution. This is a buffer. The weak acid is carbonic acid and the conjugate base is bicarbonate. Use the Henderson-Hasselbach equation. pH = pKa + log[HCO3-]/[H2CO3].

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• [DOC File]type worksheet title here - stjoe.k12.in.us

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  Feb 01, 2011 · 8. Determine the pH of a solution in which 1.00 mol H2CO3 (Ka = 4.2 x 10-7) and 1.00 mole NaHCO3 are dissolved in enough water to form 1.00 L of solution. 9. How many moles of NaHCO3 should be added to one liter of 0.100 M H2CO3 (Ka = 4.2 x 10-7) to prepare a buffer with pH = 7.00? 10.

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• REGULATION OF ACID-BASE BALANCE - Parker University

  The weak base NaHCO3 replaces the strong base NaOH. H2CO3 decreases . causing more CO2 to combine with H2O to replace H2CO3: NaOH + H2CO3 ( NaHCO3 + H2O. CO2 + H2O ( H2CO3 ( (HCO3- + H+ + + NaOH Na. therefore, (CO2 …

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• [DOC File]Hydrolysis of Salts

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  Solution Ka value Kb value Predicted pH ( 7 or N) Observed Colour of pH Paper Measured pH Hydrolysis (anionic, cationic, both or none) NaCH3COO NaCl NH4Cl (NH4)2SO4 AlCl3 Ca(NO3)2 Fe2(SO4)3 Na2CO3 Na3PO4 K2SO4 KBr (NH4)2CO3 NH4CH3COO (NH4)2C2O4 K2HPO4 KH2PO4 NaHCO3 KHSO4 NaHSO3

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