Which is the more effective buffer? O 2.0 M NaCN/1.0 M HCN O 0.25 M NaCN/0.20 M HCN O 2.0 M NaCN/1.5 M HCN O 2.5 M NaCN/2.5 M HCN

Which pair of compounds will form a buffer in aqueous solution? HCNHCN and HClHCl NaCNNaCN and KCNKCN HClHCl and NaOHNaOH HCNHCN and NaCNNaCN NaCNNaCN and NaOHNaOH HClHCl and NaCl

A buffer pair consists of a conjugate weak acid0weak base pair that will resist a change in pH from the addition of a strong acid or base. Decide whether each pair below is a good example of a buffer.a. HCN and NaCN  Good Buffer or Not a Bufferb. H2CO3 and Na2CO3  Good Buffer or Not a Bufferc. H2SO4 and NaHSO4  Good Buffer or  Not a Buffer

Which of the following would destroy a buffer containing 0.134 moles of weak acid HA and 0.268 moles of conjugate base A -?     0.134 mol of HCl     0.186 mol of HCl     0.0670 mol of NaOH     0.0447 mol of NaOH     0.268 mol of HCl

Select the combination that results in the most effective buffer? O 0.800 M HNO2; 0.799 M NANO2 O 0.800 M HCOOH; 0.100 M KCOOH 0.700 M HNO3; 0.599 M NaNO3 O 0.100 M HBr; 0.899 M NH4Br

Which of the following acid/base pairs can be used to prepare a buffer? a) NaH2PO4/NaHCO3b) HCl/NaOHc) NH4+/NH3d) HNO3/NaNO3

Which of the following solutions will be buffers? Explain your answer in each case. a) 0.10 M KCN mixed with 0.10 M HCN b) 1.0 M NaOH mixed with 1.0 M NaCl