You follow a systematic process to write formula units.
Identify the symbol of the cation and the anion.
Identify the charge of each ion and place it as a superscript above the symbol.
Calculate the numbers of each ion that make the total charge equal to zero.
Place these numbers as subscripts after the symbols.
Example:
Write the formula for a formula unit of iron(III) carbonate.
Solution
The symbol for iron is Fe. The formula for carbonate is CO₃.
The charge on iron(III) is +3, so its symbol is Fe³⁺. The charge on a carbonate ion is -2, so its formula is CO₃²⁻.
We must find the lowest common multiple of the charges. The lowest common multiple of 3 and 2 is 6. That means we need 6 + charges and 6 – charges. We need 2 Fe³⁺ and 3 CO₃²⁻.
The formula is Fe₂(CO₃)₃.
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Place Order” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.