WebbThe pKb of cyanide ion is 4.7 The pH of a solution prepared by mixing 2.5 moles of KCN and 2.5 moles of HCN in water and making total volume upto 500 ml is : A 9.3 B 7.3 C … Webb8.CN−, N2H4, (C2H5)3N, BrO− 9.N2H4, CN −, BrO−, (C 2H5)3N Explanation: The stronger the base, the larger its K b value and the smaller its pK b value from pK b = −logK b. To find the pK b for the conjugate base of a weak acid, use pKa+pK b = 14. Thus we have N2H4 (pK b = 5.77) (weakest) BrO− (pK b = 14.0− 8.69 = 5.31) CN− (pK b ...
What is the pH of 0.4 M aqueous NaCN solution? (Given pKb of …
WebbThere's one proton difference between those. Therefore we can use our equation, Ka times Kb is equal to Kw. We can plug in Kb here. Now we have Ka times 3.7 times 10 to the negative 4 is equal to Kw which is 1.0 times 10 to the negative 14. Let's do the math and solve for Ka. 1 times 10 to the negative 14. WebbDPP(1 TO ) 13th PHY - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Find the equivalent weight of reactant (i) KHC2O4·H2C2O4 (acid) (ii) (iii) K4[Fe(CN)6] (iv) Al2(SO4)3 (v) H3PO4 (vi) Zn2+ + K4[Fe(CN)6] Zn3K2[Fe(CN)6]2 (vii) Cr2O72– Cr3+ + 7H2O (viii) MnO4– MnO2 (ix) MnO4– MnO42– (x) H2S + SO2 S + H2O (xi) FeC2O4 Fe3+ … lithograph photography
Chem. Ch. 19 Hw Flashcards Quizlet
Webb27 maj 2016 · If you wish to see the context, and to see how we know that #K_aK_b = K_w#, the dissociation of the water-miscible butyric acid in water is: #"BuOOH"(l) stackrel("H ... Webb作为lpa拮抗剂的环丁基羧酸专利检索,作为lpa拮抗剂的环丁基羧酸属于·对白血病有特异性的专利检索,找专利汇即可免费查询专利,·对白血病有特异性的专利汇是一家知识产权数据服务商,提供专利分析,专利查询,专利检索等数据服务功能。 WebbSolution If pK b for CN − at 25°C is 4.7, the pH of 0.5 M aqueous NaCN solution is 11.5. Explanation: CN A − + H A 2 O HCN + OH A −; pK b = 4.7 ∴ pK a = 9.3 [OH −] = ch = c K H … lithograph painting