Transfer 6 drops of the solin into a test tube, set a drop of wait for pot aside

Question

Transfer 6 drops of the solin into a test tube, set a drop of wait for pot aside the remaining solin. 0.2 (NHSO4 to form continue adding at 0 2M Naso, while mixing until no more pot forms mix centrifuge cant a go to procedure If no pot forms during unknown analysis. go to step 25 retain decantate Procedure 26: Separation and Detection of calcium s 6M HCI Test solin 1 drop of wait for for acidity 0 2M NHCOPpt to form A son is acidie. Continue adding add SM NHOH 0.2M NHPC,04 until it is basic while mining until no more opt confirms decal presence of Cas decantate to step 24 if no opt forms during unknown analysis, go to step 26 go to procedure retain decantate

Explanation / Answer

Mg2+ reacts with ammonia (NH4OH) and disodium hydrogen phosphate (Na2HPO4) to form a white precipitate of magnesium ammonium hydrogen phosphate, Mg(NH4)HPO4. The complete ionic equation is given (both NH4OH and Na2HPO4 ionize completely).

Complete Ionic Equation:

Mg2+ (aq) + NH4+ (aq) + OH- (aq) + 2 Na+ (aq) + HPO42- (aq) --------> Mg(NH4)HPO4 (s) + 2 Na+ (aq) + OH- (aq)

Net Ionic Equation:

Cancel out the common ions from both sides.

Mg2+ (aq) + NH4+ (aq) + HPO42- (aq) --------> Mg(NH4)HPO4 (s)

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