Related InterviewSolutions

• `2.5 ` mL of `(2)/(5)` M weak monoacidic base `(K_(b)=1xx10^(-12) "at" 25^(@)C)` is titrated with `(2)/(15)` M HCl in water at `25^(@)` C. The concentration of `H^(+)` at equivalence point is `(K_(w) = 1 xx 10^(-14) "at" 25^(@)C)`A. `3.7xx10^(-13)M`B. `3.2xx10^(-7) M`C. `3.2xx10^(-2)M`D. `2.7xx10^(-2)M`
• Which of the following equimolar solutions can act as a buffer solution?(a) NH4Cl and NH4OH(b) HCl and NaCl(c) HCOOH and HCOONa(d) HNO3 and NH4NO3
• The range of pH for acidic and basic buffer is where `K_(a)` and `K_(b)` are the acid base dissociation constants, respectively.A. form `pH=pK_(a)+-2 to pH=pK_(b)+-2`B. from `pH=pK_(a)+1to pH=pK_(b)+1`C. from `pH=pK_(a)+-1to pH=pK_(b)+-1`D. from `pH=pK_(a)+1to pH=pK_(b)-1`
• Which of the following expression tepresents the Henderson equation for an acidic buffer ?A. `pH=(1)/(2)pK_(a)-(1)/(2)logC`B. `pH=pK_(a)-l"og"(["Conjugate base"])/(["Acid"])`C. `pH=pK_(a)+"log"(["Conjugate base"])/(["Acid"])`D. `pH=pK_(a)`
• An acidic buffer solution can be prepared by mixing equimolar amounts ofA. `B(OH)_(3)` and `Na_(2)B_(4)O_(7).10H_(2)O`B. `NH_(3)` and `NH_(4)CI`C. `HCI` and `NaCI`D. `CH_(3)COOH` and `CH_(3)COONa`
• Through a solution containing `Cu^(2+) and Ni^(2+),H_(2)S` gas is passed after adding dil HCl, which will precipitate out and why ?
• Give an example of acidic buffer?
• How does dilution with water affect the pH of a buffer solution?
• Through a solution containing Cu2+and Ni2+,H2S gas is passed after adding dill HCl, which will precipitate out and why?
• Write the expression for Ksp for AB3 type salt With solubility s.