hey guys ive got a question.
calculate the formate ion concentration and pH of a solution that is 0.05m in formic acid (HCOOH;Ka=1.8x10^-4) and 0.10M in HNO3.
'I' would think when wrting dissociation expression it would go like this x/(0.05*0.1)=1.8e-4 however it goes like this 0.1x/0.05=1.8e-4. why is this?
and when i calculated the Ph i just used the concentration of the HNO3, should i include the formic acid. thanks for any help