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20.What is the Ko of the weak base, Te2, if a 0.95 mol/L solution is dissociated...
5. Determine the concentration in mol/L of a solution of 25.0 mL H2SO4 that requires 38.0 mL of 0.145 mol/L KOH to reach the endpoint. HINT: Sulfuric acid is a diprotic acid which means that 2 mols KOH react with one mol H2SO4
11. To determine the concentration of a solution of sulfuric acid, a chemist titrates the solution with aqueous potassium hydroxide. She finds that 21.4 mL of 2.50 M aq. KOH is required to neutralize 10.0 mL of aq, HSO a. Write the balanced equation for this neutralization reaction b. What was the concentration of the H2SO4 solution?
It requires 38.23 mL of 0.7500 M NaOH solution to completely neutralize 155.6 mL of an aqueous solution of sulfuric acid. What is the concentration (mol/L) of the H2SO4 solution?
19. A 0.290 gram sample of a weak base is titrated with a 0.150 M HCl solution. It takes 28.0 mL of the 0.150 M HCl solution to neutralize the weak base. a) How many moles of base are in the sample? b) What is the molar mass of the weak base? 20. It takes 2.50 mL of 3.00 M NaOH to neutralize 0.750 L of an HCl solution. a) What is the concentration of the HCl solution? b) What...
1. Which of the following compounds in an aqueous solution is a weak acid? A) H2S B) HI C) HBr D) H2SO4 E) HCIO 2. Identify the major ionic species present in an aqueous solution of H2SO4. A) S6, 036-(plus H2O as a neutral species) B) H', OH, 56,302- C) 2H, 56, 402- D) H', HS04 E) 24*, SO42- 3. Which of the following represents an acid-base neutralization reaction? A) 2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g) B) SO2(g) +...
25.0 mL of 1.3 mol/L sulfuric acid is reacted with 35.0 mL of 0.67 mol/L sodium hydroxide. The solution warms from 20.0°C to 28.6°C. H2SO4 (aq) + 2NaOH (aq) => Na2SO4 (aq) + 2H20 (aq) What is the enthalpy change of the reaction (in kJ/mol)?
please help me with 5 and 6
6. Limestone can be considered to be essentially pure calcium carbonate. Acid rain can be considered to be sulfuric acid. When limestone buildings are eroded by acid rain the reaction can be summarized by the chemical equation below. CaCO+ HISO. Caso + CO. HO This reaction can be replicated in the lab by performing a titration a $6.93 g of Cacoa solid is added to 1.0 L of 0.235 mol/L sulfuric acid, how...
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At a concentration of 1 M, the weak acid HNO, is 2% ionized, and the pH of the solution is 1.7. What happens when KNO,() is dissolved into the solution? The extent of HNO, ionization The concentration of H+ The pH If a buffer solution is 0.260 M in a weak acid (K, = 6.0 x 10 ) and 0.500 M in its conjugate base, what is the pH? A 0.194 g sample of...
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IV. Heat of reaction of a weak acid with weak base Total mass of solution Final temp. of solution Initial temp. of solutions AT Water AH reaction 40 9 29 C 22"C Calculation: Heat of reaction per mole water formed Moles of water formed AH reaction per mole H,O formed Calculation Heat of dissociation of weak acid and weak base AH dissociation (per mole)- Calculation: [AH Dissociation- AH reaction -AH Neutralization (from II)] IV. Enthalpy of Neutralization of...
23. A 100.0 mL sample of 0.100 mol L-1 weak monoprotic acid is titrated with 0.0500 mol L-1 KOH. Determine the pH of the solution after the addition of 200.0 mL of KOH at 25 °C. The Ka of the weak monoprotic acid is 1.52 x 10-5. A) 5.330 B) 8.671 5.064 D) 11.091 E) 8.909