4.100.0 mL of a buffer which is 0.10 M in HCN and 0.10 M in KCN has 20.0 mL of 0.10 M HCl added to it. What is the pHafter the HCl has been added? (Ka= 4.9 x 10-10for HCN)a)9.31b)9.49c)9.01d)9.13e)8.365.A 50.0 mL sample of 0.200 M HBr solution is titrated with 0.100 M NaOH. What is the pH of the solution after adding 80.0 mLof base?6.Consider the titration of 25.00 mL of 0.150 M acetic acid (HC2H3O2, Ka= 1.8 x 10-5) with 0.100 M NaOH. What is the pH afterthe addition of 30.00 mL of NaOH?
37.Consider the titration of 40.00 mL of 0.100 M NH3with 0.250 M HCl. What is the pH at the equivalence point? (Kbfor NH3is 1.8 x 10-5.)8.What is the Kspexpression for Ca3(PO4)2?a)Ksp= [Ca2+]3[PO4b)Ksp= [Ca2+]3[PO43–]2c)Ksp= [Ca3(PO4)2][Ca2+]3[PO4d)Ksp= (3[Ca2+])3(2[PO43–])2e)Ksp= [Ca2+]2[PO43–]33–]2[Ca3(PO4)2]3–]29.At 25°C, a certain saturated solution of silver phosphate, Ag3PO4, has the following concentration of ions:[Ag+] = 3.0 x 10-5M[PO43-] = 6.7 x 10-5MWhat is the value of Kspfor silver phosphate at 25°C?10.The solubility of calcium phosphate, Ca3(PO4)2, is 1.6 x 10-7moles per liter at 25°C. What is the solubility product constant, Ksp,for calcium phosphate at 25°C?11.What is the molar solubility of strontium fluoride, SrF2, in pure water at 25°C?(Kspfor SrF2= 7.9 x 10-10at 25°C.)
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