How are chemical changes summarized in a form of balanced chemical equations? What important reaction information...

How are chemical changes summarized in a form of balanced chemical equations? What important reaction information is needed to write a complete balanced chemical equation?

Why is it necessary to write a balanced equation to completely understand the chemical properties of the reactants and products, and predict if a reaction has occurred or not?

Solutions

Expert Solution

How are chemical changes summarized in a form of balanced chemical equations?

Reactants will go on the LEFT side of the equation

Products will go on the RIGHT side of the equation

Typically we add an arrow showing the reaction progress, -->

if in euqilbirium, we add <-->

It typicallly should be balanced, stoichioemtric coefficients are shown before the molecules.

What important reaction information is needed to write a complete balanced chemical equation

We need to know

- Phases/states of matter

- Stoichiometric ratios

- Molecules involved/substance

Why is it necessary to write a balanced equation to completely understand the chemical properties of the reactants and products, and predict if a reaction has occurred or not?

- So we can relate mass/stoichioemtry to other substance/unkowns.

- We can relate to constant mass always, if it is well balanced

- For instance

CaCO3 + heat = CaO + CO2, one will assume CO2(g) will be "gone" after reaction proceeds, since it goes as "gas" and it will not be measuered in the balance. Decrease of mass will ensure our prediciton of "proceeded forward"

queen_honey_blossom answered 1 year ago

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