Which of the following solutions is a good buffer system? which of the following solutions is a good buffer system? a solution that is 0.10 m hcn and 0.10 m nacl a solution that is 0.10 m hcn and 0.10 m licn a solution that is 0.10 m hno3 and 0.10 m kno3 a solution that is 0.10 m naoh and 0.10 m hno3 a solution that is 0.10 m nacl and 0.10 m hc?

A solution that is 0.10 M HCN and 0.10 M LiCN

Explanation:

A buffer is defined as the mixture of a weak acid with its conjugate base or vice versa. Thus:

A solution that is 0.10 M HCN and 0.10 M NaCl. IS NOT A BUFFER. The HCN is a weak acid but its conjugate base is CN⁻ that is not present in that solution.

* A solution that is 0.10 M HCN and 0.10 M LiCN. IS A BUFFER. The LiCN dissolves in water forming CN⁻, the conjugate base of HCN

A solution that is 0.10 M HNO₃ and 0.10 M KNO₃. IS NOT A BUFFER. HNO₃ is a strong acid, not a weak acid.

A solution that is 0.10 M NaOH and 0.10 M HNO₃. IS NOT A BUFFER. NaOH is a strong base and HNO₃ is a strong acid.

A solution that is 0.10 M NaCl and 0.10 M HCl. IS NOT A BUFFER. HCl is a strong acid.

I hope it helps!

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

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