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Y12 Moles Assessment Review - Coggle Diagram
Y12 Moles Assessment Review
Steps To Titrate
Fill up a burette with acid. A burette is used to place the acid of unknown concentration. A burette is preferred to a measuring cylinder, as it is more precise.
Use a pipette to add alkali to a conical flask. A volumetric pipette is used to deliver a fixed volume of standard solution of alkali into a conical flask. This is also more precise than a measuring cylinder. Wash all equipment used with distilled water to make sure all of the concentration has made it into the solution
Add an indicator to the alkali. An indicator is added to the alkali in the conical flask, which causes a colour change to occur.
Slowly add the acid into the alkali. The acid from the burette is allowed to run into the alkali, swirling constantly to ensure the reactants mix well.
Stop adding acid when there is a colour change from purple to light pink/purple
Record the titre and repeat the titration. The titration is repeated until concordant (within 0.1 cm³) titres are obtained.
% Yield and Atom economy
Atom economy- Formula: Mr of desired product/Mr of total product x 100
If only when product is made then the atom economy is 100%
Atom economy is important for sustainable development. The higher the % the more sustainable the product being produced is. It is very important to sustainability and reducing pollution
% Yield- Formula: Actual yield/Theoretical yield x 100
Actual Yield is the product you get whilst theoretical yield is the product you are supposed to get
% Yield is essential within manufacturing or making chemical products. It gives a brief overview over how much waste product will be produced and much expenses it will require
The Ideal Gas Equation
Formula- PV=nRT
P-Pressure (Pa)
kPa---(x1000)-> Pa
V-Volume (m^3)
cm^3 ---(x10^-6)--> m^3
dm^3 ---(x10^-3)--> m^3
n-Moles (mol)
R- Gas Constant (8.31)
T-Temperature (K)
Cº---(+273)--> K