Question

checking comprehension
balance the following equations:

1. ( p + o _ { 2 }

ightarrow p _ { 2 } o _ { 5 } )

1. ( agf + cacl _ { 2 }

ightarrow agcl + caf _ { 2 } )

1. ( na + o _ { 2 }

ightarrow na _ { 2 } o )

1. ( h _ { 3 } po _ { 4 } + koh

ightarrow k _ { 3 } po _ { 4 } + h _ { 2 } o )

1. ( al _ { 2 } o _ { 3 }

ightarrow al + o _ { 2 } )

1. ( fe + cl _ { 2 }

ightarrow fecl _ { 3 } )
multiple-choice question
( _ agf + _ cacl _ { 2 }
ightarrow _ agcl + _ caf _ { 2 } )
( 2 agf + 1 cacl _ { 2 }
ightarrow 2 agcl + 1 caf _ { 2 } )
( 4 agf + 3 cacl _ { 2 }
ightarrow 2 agcl + 1 caf _ { 2 } )
( 30 agf + 8 cacl _ { 2 }
ightarrow 38 agcl + 7 caf _ { 2 } )
( 1 agf + 1 cacl _ { 2 }
ightarrow 1 agcl + 1 caf _ { 2 } )

Explanation:

Step1: Count atoms on both sides

For the equation \(AgF + CaCl_{2}\to AgCl + CaF_{2}\), count the number of \(Ag\), \(F\), \(Ca\), and \(Cl\) atoms.

Step2: Balance the equation

Let's assume the coefficients are \(x\) for \(AgF\), \(y\) for \(CaCl_{2}\), \(m\) for \(AgCl\) and \(n\) for \(CaF_{2}\).
For \(Ag\): \(x = m\)
For \(F\): \(x=2n\)
For \(Ca\): \(y = n\)
For \(Cl\): \(2y=m\)
If we take \(n = 1\), then \(y = 1\), \(x=2\) and \(m = 2\)

Answer:

\(2AgF+1CaCl_{2}\to2AgCl + 1CaF_{2}\)