Question

a. write balanced molecular (not ionic) equations for each of the following.
b. identify each as precipitation (forming a solid which is not soluble), acid-base (formation of a weak acid or base), neutralization (acid + base forms a salt and water), or decomposition (one substance breaks up into two). if no reaction occurs, write no observed reaction. (some reactions may involve more than one type.)
a. $ce{hno_{3} + kc_{2}h_{3}o_{2} ->}$
b. $ce{mg(clo_{3})_{2} + fe_{2}(so_{4})_{3} ->}$
c. $ce{h_{3}po_{4} + nh_{3} ->}$
d. $ce{ba(oh)_{2} + h_{2}so_{4} ->}$

Explanation:

Step1: Balance Reaction A

$\text{HNO}_3 + \text{KC}_2\text{H}_3\text{O}_2
ightarrow \text{KNO}_3 + \text{HC}_2\text{H}_3\text{O}_2$

Step2: Classify Reaction A

This is an ACID-BASE reaction (forms weak acid $\text{HC}_2\text{H}_3\text{O}_2$).

Step3: Balance Reaction B

$3\text{Mg(ClO}_3\text{)}_2 + \text{Fe}_2(\text{SO}_4\text{)}_3
ightarrow 3\text{MgSO}_4 \downarrow + 2\text{Fe(ClO}_3\text{)}_3$

Step4: Classify Reaction B

This is a PRECIPITATION reaction (forms insoluble $\text{MgSO}_4$).

Step5: Balance Reaction C

$\text{H}_3\text{PO}_4 + 3\text{NH}_3
ightarrow (\text{NH}_4\text{)}_3\text{PO}_4$

Step6: Classify Reaction C

This is an ACID-BASE reaction (forms salt from acid and base).

Step7: Balance Reaction D

$\text{Ba(OH)}_2 + \text{H}_2\text{SO}_4
ightarrow \text{BaSO}_4 \downarrow + 2\text{H}_2\text{O}$

Step8: Classify Reaction D

This is both PRECIPITATION (forms $\text{BaSO}_4$) and NEUTRALIZATION (acid + base → salt + water).

Answer:

Part a (Balanced Molecular Equations):

A. $\text{HNO}_3 + \text{KC}_2\text{H}_3\text{O}_2
ightarrow \text{KNO}_3 + \text{HC}_2\text{H}_3\text{O}_2$
B. $3\text{Mg(ClO}_3\text{)}_2 + \text{Fe}_2(\text{SO}_4\text{)}_3
ightarrow 3\text{MgSO}_4 + 2\text{Fe(ClO}_3\text{)}_3$
C. $\text{H}_3\text{PO}_4 + 3\text{NH}_3
ightarrow (\text{NH}_4\text{)}_3\text{PO}_4$
D. $\text{Ba(OH)}_2 + \text{H}_2\text{SO}_4
ightarrow \text{BaSO}_4 + 2\text{H}_2\text{O}$

Part b (Reaction Classification):

A. ACID-BASE
B. PRECIPITATION
C. ACID-BASE
D. PRECIPITATION, NEUTRALIZATION