Chemistry help ASAP.? PLEASE? You're told to make a buffer:
"Prepare 0.100 L of a pH=6.85 buffer with a total concentration of 0.0400 M by mixin 10.0mL of 0.10 M H2CO3 with 30mL of 0.10 M NaHCO3."
Your data table when your done is:
Average pH of buffer = 6.38
Average pH of DI water = 6.81
pH of buffer after adding HCl = 6.00
pH of buffer after adding NaOH = 6.90
pH of DI water after adding HCl = 2.52
pH of DI water after adding NaOH = 12.15
And you're told to:
"Verify that the volumes of acid and base you were asked to use will result in the correct concentration of the buffer."
Can you help me with this? I have no idea what I'm suppose to do exactly or how I'm supposed to "verify" (?). Please.
"Prepare 0.100 L of a pH=6.85 buffer with a total concentration of 0.0400 M by mixin 10.0mL of 0.10 M H2CO3 with 30mL of 0.10 M NaHCO3."
Your data table when your done is:
Average pH of buffer = 6.38
Average pH of DI water = 6.81
pH of buffer after adding HCl = 6.00
pH of buffer after adding NaOH = 6.90
pH of DI water after adding HCl = 2.52
pH of DI water after adding NaOH = 12.15
And you're told to:
"Verify that the volumes of acid and base you were asked to use will result in the correct concentration of the buffer."
Can you help me with this? I have no idea what I'm suppose to do exactly or how I'm supposed to "verify" (?). Please.