What Is the Correct Formula for Magnesium Phosphate?

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SUMMARY

The correct chemical formula for magnesium phosphate is Mg3(PO4)2, not Mg3(PO5)2 as initially stated. The confusion arises from the incorrect representation of phosphate ions, where PO4^3- should be used instead of PO5. Additionally, the acids referred to as chlorhydric and iodhydric acids are correctly identified as hydrochloric acid (HCl) and hydroiodic acid (HI). Understanding the criss-cross rule for ion charges is essential for accurately writing chemical formulas involving polyatomic ions.

PREREQUISITES
  • Understanding of chemical formulas and nomenclature
  • Knowledge of polyatomic ions, specifically phosphate (PO4^3-)
  • Familiarity with the criss-cross rule for balancing ionic charges
  • Basic chemistry knowledge regarding acids and their formulas
NEXT STEPS
  • Study the properties and reactions of magnesium phosphate (Mg3(PO4)2)
  • Learn about polyatomic ions and their significance in chemical formulas
  • Research the criss-cross method for balancing ionic compounds
  • Explore the characteristics and applications of hydrochloric acid (HCl) and hydroiodic acid (HI)
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Chemistry students, educators, and anyone interested in understanding chemical formulas and nomenclature, particularly in the context of inorganic chemistry.

simhank
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Everyone keeps telling me I am writing this formula down wrong but it is one my teacher gave to figure out...am I wrong and what formula name is it?

Mg3(PO5)2

Also not sure what chemical formula for these two are any help would be great

1. Chlorhydric acid
2. Iodhydric acid
 
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It is suppose to be Mg3(PO4)2. Notice the 4 instead of 5. There is no such thing as the acids you mentioned. I think you mean Hydrochloric and Hydroiodic acids, they are HCl and HI
 
simhank said:
Everyone keeps telling me I am writing this formula down wrong but it is one my teacher gave to figure out...am I wrong and what formula name is it?

Mg3(PO5)2

Also not sure what chemical formula for these two are any help would be great

1. Chlorhydric acid
2. Iodhydric acid

You shud write the 2 molecules in their ion form, it will help you to write the formula out right: Mg+2 + PO4^3- = Mg3(PO4)2, use the criss-cross rule especially when working with polyatomic ions. Also, the there are only 2 forms PO4^3- and PO4^2-.

Those acids are just common industry names for HCl and HI.

Hope this helps :)
 
ok Thanks for your help
 

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