Jump to content

How to find the composition of an unknown precipitate?

Recommended Posts

I am working on some chemistry homework and I encountered a question that I am having a hard time with.

"After the precipitate from the sodium carbonate and iron compound reaction was filtered and dried, the mass was 0.180 grams. Write balanced chemical reactions for the iron compound as Iron (III) and as Iron (II)  with the sodium carbonate. What is the precipitate?"

Basically 0.002 moles of sodium carbonate were added to a solution of water and some unknown iron compound. When the sodium carbonate was added a precipitate formed.

Here is a link to the video of the reaction: https://drive.google.com/file/d/1Aq5POw2sTHozL2_yBOdVn2YnS8K2natP/view?usp=sharing

Any help would be very much appreciated!

Share this post

Link to post
Share on other sites

Firstly, what do you know about the solubility of sodium and other Group I metal compounds? Have you written out the balanced reactions? You don’t need to know what the initial iron compound is for this, just assume you have either Fe 2+ or Fe 3+ ions (as in, write two equations). 

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.