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Consider the following equation:NaOH + Fe (NO3)3 → Fe (OH)3 + NaNO3Given: Types of ReactionsCombination ReactionDecomposition ReactionSingle Replacement ReactionDouble replacement ReactionCombustion ReactionDirections:1. Write the balanced equation.2. Identify the type of reaction that is taking place and explain your rationale for choosing this classification.

Consider the following equation:NaOH + Fe (NO3)3 → Fe (OH)3 + NaNO3Given: Types of-example-1
User Shubham Sahu
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1 Answer

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27 votes

Step-by-step explanation:

Given the following reaction:

__ NaOH + __ Fe(NO₃)₃ ---> __ Fe(OH)₃ + __ NaNO₃

A double replacement reaction is a type of chemical reaction where the two reactants exchange their ions to produce two new products.

A double replacement reaction has the following shape:

AB + CD ----> AC + BD

Which is similar to our reaction. NaOH and Fe(NO₃)₃ are exchanging their ions to form Fe(OH)₃ and NaNO₃.

So our reaction is a double replacement reaction.

Now we have to balance it.

__ NaOH + __ Fe(NO₃)₃ ---> __ Fe(OH)₃ + __ NaNO₃

The first step to balance a reaction is to dermine the number of atoms of each element that we have on both sides of the equation. In this case, since it is a double replacement reaction, it is easier to work with the ions or group of atoms that are being exchanged.

__ NaOH + __ Fe(NO₃)₃ ---> __ Fe(OH)₃ + __ NaNO₃

Na: 1 Na: 1

OH: 1 OH: 3

Fe: 1 Fe: 1

NO₃: 3 NO₃: 1

The Na atoms are already balanced since we have 1 atom of Na on each side of the equation. Then we have 1 OH group on the left side and 3 OH groups of the right. To balance it we have to change the coefficient for NaOH and write a 3 there.

3 NaOH + __ Fe(NO₃)₃ ---> __ Fe(OH)₃ + __ NaNO₃

Na: 3 Na: 1

OH: 3 OH: 3

Fe: 1 Fe: 1

NO₃: 3 NO₃: 1

Now, we balanced the OH but unbalanced the Na atoms. We have 3 atoms of Na on the left and 1 Na atom of the right. We can change the coefficient for NaNO₃ to balance it.

3 NaOH + __ Fe(NO₃)₃ ---> __ Fe(OH)₃ + 3 NaNO₃

Na: 3 Na: 1

OH: 3 OH: 3

Fe: 1 Fe: 1

NO₃: 3 NO₃: 3

Finally we have the same number of atoms of each element on both sides of the equation. The equation is balanced.

3 NaOH + Fe(NO₃)₃ ---> Fe(OH)₃ + 3 NaNO₃

Answer:

1. 3 NaOH + Fe(NO₃)₃ ---> Fe(OH)₃ + 3 NaNO₃

2. Double replacement.

User Paul Hachmang
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