Im in the middle of homework and i came across this question that i have been wo

Question

Im in the middle of homework and i came across this question that i have been working on for a couple days. I entered what i thought would be it, however i got a response that says "Use subscripts to represent the number of each type of atom or ion in a molecule".. it didnt count it wrong but it didnt count it right. which means im close but not close enough. can someone please help me out?

Question:

A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation for this reaction.

Express your answer as a chemical equation. Identify all of the phases in your answer.

My answer i put was: Ca(OH)2(s)+2HNO3(aq) ---> Ca(NO3)2(l) + 2H20(l)

Thats the answer i put, and it said "Use subscripts to represent the number of each type of atom or ion in a molecule"

the next question was " Write a net ionic equation for this reaction.Express your answer as a chemical equation. Identify all of the phases in your answer." I got:

H + (aq) + OH - (aq) --> H20

it said it was wrong.... So im confused all together. I tried emailing and calling my professor but he wont return any of my messages.

Last one is to classify which one is "precipitation, Oxygen Reduction, Acid Base"

(CH3COO)2Sr(aq) + (NH4)2SO4(aq) --> SrSO4(s) + 2CH3COONH4(aq)

PbCl2(aq) + KI(aq) --> PbI2(s) + 2KCl(aq)

4Cr(s) + 3O2(g) --> 2Cr203(s)

2Zn(s) + O2(g) --> 2ZnO(s)

Zn(s) + Cu^2+(aq) --> Zn^2+(aq) + Cu(s)

Mg(OH)2(aq) + H2SO4(aq) --> 2H2O(l) + MgSO4(aq)

3NaOH(aq) --> Na3PO4(aq) + 3H2O(l)

Explanation / Answer

The correct answer is ( to use subscripts):

Ca(OH)2(aq) + 2HNO3(aq) ---> Ca(NO3)2(aq) + 2H20(l)

-----------------------------------------------------------------------------------------------------------

The net ionic equation: You need to input the charges as superscripts as well as phases too.

The correct answer is,

H+(aq) + OH -(aq) --> H20(l)

-----------------------------------------------------------------------------------------------------------------------------------

(CH3COO)2Sr(aq) + (NH4)2SO4(aq) --> SrSO4(s) + 2CH3COONH4(aq) (Precipitation)

PbCl2(aq) + KI(aq) --> PbI2(s) + 2KCl(aq) (Precipitation)

4Cr(s) + 3O2(g) --> 2Cr203(s) (Oxidation-Reduction reaction)

2Zn(s) + O2(g) --> 2ZnO(s) (Oxidation-Reduction reaction)

Zn(s) + Cu^2+(aq) --> Zn^2+(aq) + Cu(s) (Oxidation-Reduction reaction)

Mg(OH)2(aq) + H2SO4(aq) --> 2H2O(l) + MgSO4(aq) (acid-base)

3NaOH(aq) --> Na3PO4(aq) + 3H2O(l) (You gave this reaction, which is incorrect)

The reaction might be 3NaOH (aq) + H3PO4 (aq) -----------> Na3PO4(aq) + 3H2O(l)   (acid-base)

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects