Commando007
Member
- Joined
- Nov 2, 2015
- Messages
- 57
- Gender
- Male
- HSC
- 2017
help plz
-
Finished your HSC? Check out our University Discussion, Non-School forums or help out next year's HSC students! -
YOU can help the next generation of students in the community! Share your trial papers and notes on our Notes & Resources page
random pH question (1 Viewer)
- Thread starter Commando007
- Start date
help plz
This is a limiting reagents q. So first find moles of both with the n=cv formula
will give 0.002 moles of HCl and 0.0006 moles of Barim hydroxide
Write a chemical equation:Ba(OH)2 + 2HCl -----> BaCl2 + 2H2O
so Ba(OH)2 is the limiting reagent. Meaning only 0.00l2 moles of HCl react. leaving behind 0.0008 moles of HCl in a 100mL solution, so find concentration which is 0.008M. Now from ph=-log(H+) gives 2.09691001301 (B)
will give 0.002 moles of HCl and 0.0006 moles of Barim hydroxide
Write a chemical equation:Ba(OH)2 + 2HCl -----> BaCl2 + 2H2O
so Ba(OH)2 is the limiting reagent. Meaning only 0.00l2 moles of HCl react. leaving behind 0.0008 moles of HCl in a 100mL solution, so find concentration which is 0.008M. Now from ph=-log(H+) gives 2.09691001301 (B)