Edexcel ial chemistry - unit 05 - may/june 2019 Watch

Saman_B9
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Are Thymine, Adenine, Cytosine and Guanine amino acids?
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Crow_M
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No, they are nitrogenous bases. Three bases make an amino acid.
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Saman_B9
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(Original post by Crow_M)
No, they are nitrogenous bases. Three bases make an amino acid.
Thank you
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Saman_B9
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Someone help me understand this question, please?
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CheeseIsVeg
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CheeseIsVeg
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(Original post by Saman_B9)
Someone help me understand this question, please?
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CheeseIsVeg
Hey there
Let's break your question down a bit so you can understand it thoroughly.
The question says Aluminium reacts with aqueous alkali.
What is an aqueous alkali?
Well aqueous means dissolved in water and an alkali is a base dissolved in water.
Can you think of a way of expressing this?

Hint: aqueous
Spoiler:
Show


Maybe add some water molecules to the LHS of the equation? This will help balance things out.


Hint: Alkali
Spoiler:
Show


You must know some simple molecules that act as bases.
How about NaOH for example? Pop that into the equation with Aluminium and Water and balance it to get hydrogen and a salt.
This should get you to the correct answer! Good luck :hugs:

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Saman_B9
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(Original post by CheeseIsVeg)
Hey there
Let's break your question down a bit so you can understand it thoroughly.
The question says Aluminium reacts with aqueous alkali.
What is an aqueous alkali?
Well aqueous means dissolved in water and an alkali is a base dissolved in water.
Can you think of a way of expressing this?

Hint: aqueous
Spoiler:
Show


Maybe add some water molecules to the LHS of the equation? This will help balance things out.

Hint: Alkali
Spoiler:
Show


You must know some simple molecules that act as bases.
How about NaOH for example? Pop that into the equation with Aluminium and Water and balance it to get hydrogen and a salt.
This should get you to the correct answer! Good luck :hugs:
Thanks for helping
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