Determining the charges of a cation and anion are fundamental in Writing Ionic Compounds.
Writing Ionic Compounds
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Writing Ionic Compounds
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here we have the rules for writing ionic compounds. Now, Step one. We write the ions involved in the compound from the provided name step to use these ions to write the formula of the Ionic compound. So if we take a look here, we have aluminum nitride and berry, um, phosphate. All right, so we're gonna say aluminum is in group three A. Because of that, it's charge is plus three or three plus. So that's why you write it as a all three plus nitride. I would mean that it is a non metal, and it had its ending change to ID. Nitrogen is in group 58 so his charge is three minus. Now, if you don't quite remember the charges associated with the different groups of the periodic table, make sure you go back and take a look at my videos on the periodic table charges. Okay, that will help you see all the elements of the periodic table. And what are the common types of charges based on the location of the element. Now, for this first one, when numbers in charges are the same, So here the numbers are three and three. Okay, so the numbers are three and three. They cancel out to combine the elements. So since they both have three in their charges, they just cancel out its aluminum nitride will be a little end now, Barry, Um, phosphate barium is in group two way. So it's charges two plus phosphate is one of our Polly atomic ions. It's one of our common tetra oxides. Its formula is peel for three minus. Now, when the numbers in charges air different here, this is to when this is three. Then they crisscross. They crisscross to combine the elements. So what I mean by crisscross is that the two from here would come here and the three from here would come here. That would give me if we look it. Give me be a The three came down here. Now this, too, is for the entire Polly Atomic ion for both phosphorus and oxygen. So because it's for both of them, I have to put it in parentheses, p 04 and then the little too. So that would represent barium phosphate. These are the things you must do when given the name of an Ionic compound right out its ions. And then look to see are the numbers and the charges the same. If so, they cancel out. Are they different? If so, crisscross them. Now, doing this crisscrossing motion, we don't have to worry about crisscrossing the charges. Okay, so you're only crisscrossing the numbers. Doing this type of action takes care of the charges on them on their own, so just ignore them. Okay, So these will be our two formulas for these ionic compounds. Now that we've gotten down the basics will move on to some problems and put what we just learned into practice.
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Writing Ionic Compounds Example 1
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here in this example question, it says provide the molecular formula for the following compound. We have magnesium sulfate, so magnesium is MG. Magnesium is in group two A. So it's charge is plus two or two plus now, Saul, fate okay, eight is a good indicator that this is a poly atomic ion. If you remember, sulfate is one of our common types of tetra oxides, meaning that we have four oxygen's involved. Alright, So soft means we're dealing with sulfur. It is one of our common tetroxide. So it has four oxygen's and it has a charge of two minus. The poly atomic ions can be a little bit of annoying, but again go back and review the polic atomic ions if you don't remember them. Now we look at our M g two plus and R S L four to minus. Look at the numbers within the charges. Here we have it too. And here we have it too. Remember when the numbers are the same, they just cancel out and then you combine the elements together. So the two plus in the tu minus cancel out. So what we'll have left is MG s So magnesium sulfate is represented by M. G s 04
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Problem
Provide the molecular formula for the following compound:Copper (I) nitrate
A
CuNO3
B
Cu(NO3)2
C
Cu(NO3)3
D
CuNO2
E
Cu(NO2)2
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Problem
Provide the molecular formula for the following compound:Sodium dichromate
A
NaCr2O7
B
Na(Cr2O7)2
C
NaCrO4
D
Na2Cr2O7
E
Na2CrO4
Additional resources for Writing Ionic Compounds
PRACTICE PROBLEMS AND ACTIVITIES (49)
- Predict the formula of the ionic compound that forms between potassium and sulfur. (LO 6.11) (a) KS (b) KS2 ...
- What is the correct formula for sodium phosphate? (LO 2.24) (a) Na3PO4 (b) Na3P (c) NaPO4 (d) Na(PO4)2
- Predict the chemical formula of the ionic compound formed between the following pairs of elements: (a) Al and ...
- Predict the chemical formula of the ionic compound formed between the following pairs of elements: (d) Li and...
- Predict the chemical formula of the ionic compound formed between the following pairs of elements: (b) Mg and ...
- Which ionic compound is expected to form from combining the following pairs of elements? (d) aluminum and sel...
- Which ionic compound is expected to form from combining the following pairs of elements? (c) strontium and su...
- Three binary compounds are represented on the following drawing: red with red, blue with blue, and green with ...
- Write a formula for the ionic compound that forms between each pair of elements. d. aluminum and oxygen
- Write a formula for the ionic compound that forms between each pair of elements. a. silver and chlorine b. sod...
- Write a formula for the compound that forms between potassium and each polyatomic ion. a. carbonate b. phospha...
- Write the formula for each ionic compound. f. potassium hydrogen carbonate
- Write the formula for each ionic compound. c. silver nitrate
- Write the formula for each ionic compound. a. copper(II) chloride
- Write the formula for each ionic compound. f. iron(II) phosphate
- Write the formula for each ionic compound. d. calcium fluoride
- Write the formula for each ionic compound. b. copper(I) iodate
- Using only the elements P, Br, and Mg, give formulas for the following. (a) An ionic compound
- Using only the elements Ca, Cl, and Si, give formulas for the following. (a) An ionic compound
- Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the fo...
- Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the fo...
- Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the fol...
- Write the chemical formulas for the following compounds: (g) sodium hypobromite.
- Write the chemical formulas for the following compounds: (f) iron(III)carbonate
- Write the chemical formulas for the following compounds: (c) copper(I) oxide
- Give the chemical formula for each of the following ionic compounds: (g) potassium dichromate.
- Give the chemical formula for each of the following ionic compounds: (d) iron(II) perchlorate
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Each of the following pairs of elements will react to form a binary ionic compound. Write the formula of each ...
- Element X reacts with element Y to give a product containing X3+ ions and Y2-ions. (c) What is the formula of ...
- Fill in the blanks in the following table: Cation Anion Formula Name Sodium carbonate Ni2+ CH3COOCu( ClO4)2 Ca...
- Fill in the blanks in the following table: Cation Anion Formula Name Sodium carbonate Ni2+ CH3COOCu( ClO4)2 Ca...
- Because many ions and compounds have very similar names, there is great potential for confusing them. Write t...
- Because many ions and compounds have very similar names, there is great potential for confusing them. Write t...
- Write formulas for the following binary compounds: (a) Potassium chloride (b) Tin(II) bromide (c) Calcium ox...
- Write formulas for the following binary compounds: (a) Vanadium(III) chloride (b) Manganese(IV) oxide (c) Cop...
- Write formulas for the following compounds: (a) Calcium acetate (b) Iron(II) cyanide (c) Sodium dichromate ...
- Write formulas for the following compounds: (a) Lithium phosphate (b) Magnesium hydrogen sulfate (c) Mangane...
- What are the formulas of the compounds formed from the following ions? (a) Ca2+ and Br- (b) Ca2+ and SO42- (c...
- Write formulas for compounds of calcium with each of the following: a) Chlorine b) Oxygen c) Sulfur
- Write formulas for compounds of rubidium with each of the following: (a) Bromine (b) Nitrogen (c) Selenium
- Fill in the missing information to give formulas for the fol-lowing compounds: (a) Na?SO4 (b) Ba?(PO4)? (c) G...
- Write formulas for each of the following compounds: (a) Sodium peroxide (b) Aluminum bromide (c) Chromium(III...