Calculations from Balanced Equations

What volume of carbon dioxide in litres, at room temperature and pressure, was produced in this neutralisation reaction? \[LC 2004 Stoi.4 pg 6\]

• notice that is said room temperature and pressure, not standard room temperature and pressure

• So we use molar volume 24L and not 22.4L

Mass=(_)(_)

mass=density(volume)

What is a limiting reactant/part in a reaction?

It is the reaction that is completely used up first, and therefore determines the stop of the reaction

What is the excess reactant in a reaction?

It is the leftover reactant that remains after the limiting reactant is consumed.

The __________ is the reactant that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

limiting

Excess reactant is a reactant that is present in ___________ amount than the stoichiometrically required amount for a chemical reaction.

excess, surplus

List the method to determine a limiting reactor in a reaction

1. Change information about products and reactants to moles

2. Choose prod/reactant molar no. and use it and the molar ratio to see how much you need vs. have.

3. Compare

Answer Question (i) Determine the limiting reactant

HCl

To find the amount of product prodced the ___ reactant must be used for the ration/working out.

Limiting because the amount of product is determined by the limiting reactant.

* The result is known as the theoretical yield or the maximum yield/ 100% perfect reaction

How do you know if products are gaseous?

\[g\]

How is % yield calculated?

actual yield / theoretical yield (100)

\-actual yield=reaction of result

\-theoretical yield= in a perfect scenario result