課程名稱︰普通化學乙上 課程性質︰必帶 課程教師︰林英智教授 開課學院：工學院 開課系所︰材料系 考試日期（年月日）︰九十八年十月二十日 考試時限（分鐘）：一百一十五分鐘 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1.a 74.0ml sample of 0.13M HNo2(Ka=4.0x10^-4) is titrated with 0.14M NaOH, what is the pH after 25.8ml of NaOH has been added? 2.a solution is made by mixing equal volumes of 0.20M HCN(Ka=6.2x10^-10) and 0.20M NH3(Kb=1.8x10^-5). Determine the pH of the solution 3.the ksp of Al(OH)3 is 2.0x10^-32. At what pH will a 0.2M Al3+ solution begin to show precipitation of Al(OH)3 4.calculate the pH of a 5.0M solution of aniline(Kb=3.8x10^-10) 5.titrating 30.00ml of a saturated calcium iodate solution requires 28.91 ml of a 0.092 M solution of Na2S2O3, calculate the ksp of Ca(IO3)2 6.calculate the concentration of Ag+, Cl-,CrO4 2- in a saturated aqueous solution of AgCl and Ag2Cr2O4. ksp for Ag2CrO4=9.0x10^-12 ksp for AgCl=1.6x10^-10 7.A solution contains 10 mmol of H3PO4 and 5.0 mmol of NaH2PO4. how many millitiers of 0.10M NaOH MUST BE ADDED to reach the second equivelance point of the titration of the H3PO4 with NaOH 8.calculate the pH at the equivelance point for the titration of 1.0M ethylamine, by 1.0M perchloric acid (pKb for C2H5NH2=3.25) 9.A 0.10 mol sample of a diprotic acid,H2A, is dissolved in 250ml of water. Ka1-1.0x10^-5,Ka2=1.0x10^-10. calculate the concentration of A2- in this solution 10.A 200ml solution contains 0.018 mol each of I-, Br-, Cl-. when the solution is mixed with 200ml of 0.24M AgNO3, how much Agcl precipitates out? Ksp(AgCl)=1.6x10^-10, Ksp(AgBr)=5.0x10^-13, Ksp(AgI)=1.5x10^-16 --

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