Titration Questions Help

Announcements
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hi, so I have a few calculation questions regarding Titration that I am finding particularly difficult. Could anyone help me with them?

    1. What volume of HCl of concentration 0.25moldm-3 is needed to neutralise 5.3g of anhydrous sodium carbonate?

    2. A standard solution was prepared by dissolving 2.6061g of anhydrous sodium carbonate in distilled water and making up to 250cm3. A 25.0cm3 portion of this solution was titrated against HCl. 18.7cm3 of the acid was required for neutralisation. What is the concentration of the acid?

    3. A standard solution was preparing by dissolving 2.12g of anhydrous sodium carbonate in distilled water and making up to 100cm3. A 25.0cm3 portion of this solution was titrated against HCl. 33.3cm3 of the acid was required for neutralisation. What is the concentration of the acid?

    I am getting pretty ridiculous answers when I try them, so any clarification would be great. Thank you!
    Offline

    3
    ReputationRep:
    \mathrm{2HCL+NaCO_3 \rightarrow NaCl_2+H_2O+CO_2}
    1.Hydrochloric acid reacts with sodium carbonate in a 2:1 ratio. Work out the moles of sodium carbonate, use stochiomtery to work out the moles of acid and then you can use this to determine the volume needed.

    2. Work out the number of moles in 250cm^3. you'll have a 10th in 25cm^3. Acid will have double the number of moles. Work out the concentration.

    3. Same as no 2
 
 
 
Write a reply… Reply
Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: October 11, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Which is the best season?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

Sponsored content:

HEAR

HEAR

Find out how a Higher Education Achievement Report can help you prove your achievements.

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.