Final answer:
The 5 steps of writing the formula of ionic compounds containing polyphonic ions are: identify ions, determine charges, balance charges, write the formula, indicate charge. Option A.
Step-by-step explanation:
The correct answer is A) Identify ions, determine charges, balance charges, write the formula, indicate charge.
The steps for writing the formula of ionic compounds containing polyatomic ions are:
Identify the ions present in the compound. Polyatomic ions are groups of atoms that together carry a charge, such as the nitrate ion (NO3-).
Determine the charges of the ions. This can be done by referring to a periodic table or by memorizing common ion charges. For example, the nitrate ion has a charge of -1.
Balance the charges of the ions. This is done by ensuring that the total positive charge of the cation (positively charged ion) equals the total negative charge of the anion (negatively charged ion).
Write the formula by placing the symbol of the cation followed by the symbol of the polyatomic ion. Use subscripts to indicate the number of each ion present in the compound, if necessary.
Indicate the charge of the overall compound by writing the charge of the cation in superscript form outside the formula.
For example, if we want to write the formula for the compound formed between calcium ions (Ca2+) and nitrate ions (NO3-), we first identify the ions as calcium and nitrate.
The charges are +2 for calcium and -1 for nitrate. To balance the charges, we need two nitrate ions for every one calcium ion. Therefore, the formula is Ca(NO3)2, and the overall charge is 0
So Option A.