Homework Help: chemistry

Posted by jeffrey on Friday, August 24, 2012 at 8:05pm.

Q: Calculate the unknown molar concentration of CH3NH2 in MeOH titrated against a known molar concentration of HCl ?

Could you please answer this, there are lots of examples around calculation PH of two known's but not so much of unknown concentration.

thankyou.

chemistry - DrBob222, Saturday, August 25, 2012 at 7:01pm
If you had given some numbers it would have been easier; however, here is the procedure.
1. Write the equation and balance it.
CH3NH3 + HCl ==> CH3NH3Cl

2. mols HCl used = M HCl x L HCl = ?

3. mols CH3NH2 = same as mols HCl (since the equation is 1 mol CH3NH2 to 1 mol HCl).

4. M CH3NH2 = moles CH3NH2/L CH3NH2.
Done.
chemistry - jeffrey, Sunday, August 26, 2012 at 2:10am
thanks, sorry,

10ml of the unknown mixture was titrated

methyl orange was used

it took 7.5ml of 1M HCl (.0074Mol ?)

so this means .00074Mol CH3NH2 / ml ?

Answer this Question

Related Questions

chemistry - 31.0mL sample of LiOH, concentration unknown, is titrated with .52 M...
Chemistry-Titration - Acid (Unknown) Solution: HCL Molar Ratio: 1:1 Volume:20 ml...
chemistry - if 50.0 mLs of HCl of unknown concentration is titrated to ...
chemistry - if 50.0 mLs of HCl of unknown concentration is titrated to ...
Chemistry - A sample of Hydrochloric Acid (HCl) has a concentration of 5.00 %(m/...
Chemistry - a 15.00mL sample of NaOH was titrated to the stoichiometric point ...
Chemistry - It requires 17.9 mL of 0.120 M KOH to titrate 78.0 mL of an HCl ...
Chemistry - A student completes titration by adding 12.0 mL of NaOH(aq) of an ...
chemistry - A student completes a titration by adding 12.0 milliliters of NaOH(...
Chemistry - A student completes a titration by adding 12.0 milliliters of NaOH(...

For Further Reading

First Name:
School Subject:
Answer: