Question 6. 1M CH_{step step three}COOH solution. The dissociation constant of acetic acid is 1.8 x 10 -5 . Answer: pH = – log[H + ] For weak acids,

Question 7. Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. K_a for acetic acid is 1.8 x 10 -5

Given that K_a = 1.8 x 10 -5 pK_a = – log (1.8 x 10 -5 ) = 5 – log 1.8 = 5 – 0.26 = cuatro.74 pH = 4.74 + log \(\frac < 0.20>< 0.18>\) = 4.74 + log \(\frac < 10>< 9>\) = 4.74 + log 10 – log 9 = 4.74 + 1 – 0.95 = 5.74 – 0.95 = 4.79

Concern 8. What is the pH out-of an aqueous provider acquired of the combination six gram of acetic acid and 8.2 gram out of sodium acetate and you can putting some regularity comparable to five hundred ml. (Given: K to own acetic acid are 8 x ten) Answer: Centered on Henderson – Hessalbalch picture,

• the newest hydrolysis ongoing,
• degree of hydrolysis and you may
• pH of O.1 M CH3COONa solution (pK_a for CH₃COOH is 4.74).

₃COONa is a salt of weak acid (CH₃COOH) and a strong base (NaOH). Hence, the solutions is alkaline due to hydrolysis. CH₃COO (aq) + H₂O (aq) \(\rightleftharpoons\) CH₃COOH (aq) + OH – (aq) Give that pK_a = 4.74 pK_a = – log K_a i.e., K_a = antilog of ( – PK_a) = antilog of ( – 4.74) = antilog of( – 5 + 0.26) 10 -5 x 1.8

1. BaSO₄
2. Ag₂(CrO₄)

Calculate new pH out of 0

Question 1. Which one of the following buffer is present in blood? (a) CH₃COOH + CH₃COONa (b) NH₄OH + NH₄Cl (c) H₂CO₃ + NaHCO₃ (d) HCI + NaCl Answer: (c) H₂CO₃ + NaHCO₃

Matter dos. And this of one’s adopting the is usually included in the newest manure community? (a) Lactic acid (b) Sulphuric acid (c) Tannic acidic (d) Carbonic-acid Address: (b) Sulphuric acidic

Answer: CH

Question 3. Which of the following is present in an antacid tablet? (a) NaOH (b) Mg(OH)₂ (c) Al(OH)₃ (d) either (b) or (c) Answer: (d) either (b) or (c)

Concern 4. This new acidic within whole milk was ………….. (a) Lactic acid (b) Tannic acid (c) Tartaric acidic (a) Acetic acid Answer: (a) Lactic acidic

Concern 5. Think about the after the comments. (i) Acid needs bitter (ii) Acidic converts red litmus so you can blue (iii) Acid responds which have metals and you will liberates hydrogen gas

Hence of your own a lot more than statement was We are proper? (a) (i) merely (b) (i) (ii) (c) (i) (iii) (d) (ii) simply Address: https://datingranking.net/escort-directory/los-angeles/ (c) (i) (iii)

Concern six. Take into account the following statements. (i) Acid choices bitter. (ii) Acid converts bluish litmus so you can purple (iii) Acid is likely to accept a good proton off their ingredients.

And this of your own over report was We commonly right? (a) (i) (ii) (b) (ii) (iii) (c) (iii) merely (a) (ii) simply Answer: (c) (iii) just

Question 7. Which of the following can act as an acid as well as a base by Lowry – Bronsted theory? (a) H₂O (b) NH₃ (c) NH₄OH (d) Ca(OH)₂ Answer: (a) H₂O

Question 8. In the reaction HCI + H₂O \(\rightleftharpoons\) H₃O + Cl – which one of the acid-base pair? (a) HCl + H₃O + (b) HCI + CI – (c) H₃O + Cl (d) H₂O + Cl – Answer: (b) HCI + CI –

Question 9. Which of the following is considered Lewis acid? (a) NH₃ (b) BF₃ (c) HF (d) HCl Answer: (b) BF₃

Question 10. Which of the following is considered as Lewis base? (a) BF₃ (b) AICI₃ (c) HCI (d) NH₃ Answer: (d) NH₃