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REVISIONC4 1st Half! (H)
An acid can be neutralised by adding a ______ or an ______ to it. An _______ is a soluble _______. An alkali can be neutralised by adding an ______ to it. (5)
ACID ALKALI BASE ALKALI BASE
How many elements and atoms are in this compound? (explain your answer)
CaCO3
What do we call solutions with a pH of less than 7, exactly 7, and more than 7
Complete the neutralisation equation
Base + _______ _______ + salt
A process has a predicted yield of 50 kg but only 12.5 kg is produced calculate the percentage yield. (explain your answer)
Percentage yield = actual yield x 100
Predicted yield
Calculate the formula mass of ammonia
N: 14 H:1
3NH
State two reasons fertilisers are put onto crops
What are the 3 main chemical elements that plants need? (3)
What must fertilisers do before they can be absorbed by plants
(2)
What are the two elements that ammonia is made from
Which acid and base are needed to make the following fertilisers;
ammonium sulphate and ammonium nitrate. (3)
List three factors that affect the cost of making a substance
Match these squares up
The higher the pressure
The higher the temperature
Using a catalyst Increases the plant cost
Increases the energy cost
Reduces the cost by increasing the reaction rate
What does this symbol mean?
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