Question

Write down the formulae of the compounds that can be formed from the ions. Please help me​

Answer 1

SO4 and Na ~ Na2SO4

Cl and Fe~. FeCl3

PO4 and Ca-. Ca2(PO4)3

Cr2O7 And NH4-. (NH4)2Cr2O7

No3 and Mg-. Mg(NO3)2

HEY PLEASE MARK AS BRAINLIEST!! THIS TOOK ME TIME TO TYPE THANKYOU

Answer 2

Answer:

• $Na_2SO_4$
• $FeCl_3$
• $Ca_3(PO_4)_2$
• $(NH_4)_2Cr_2O_7$
• $Mg(NO_3)_2$

Explanation:

Compounds are formed by the combination of cation and anion.

On combining all the possible positive ions with negative ions, we get

$SO_4 and Na - Na_2SO_4$- Sodium sulfate is an important compound of sodium. When anhydrous, it is a white crystalline solid of formula $Na_2SO_4$.

$Cl$and $Fe - FeCl_3 - 2 Fe + 3 Cl_2 → 2 FeCl_3$

$PO_4$ and $Ca - Ca_3(PO_4)_2$ - Monobasic calcium phosphate is obtained by adding excess phosphoric acid to either a dibasic solution or a tribasic calcium phosphate solution and letting the solution to evaporate.

$Cr_2O_7$ And $NH_4-. (NH_4)_2Cr_2O_7$

$NO_3$ and $Mg - Mg(NO_3)_2 - Mg(NO_3)_2$ is an inorganic nitrate salt of magnesium with a chemical name Magnesium nitrate.