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## Hi, I'm Andrew

Experienced international teacher and school leader. Have taught Chemistry to A Level and HL IBDP and Biology to A Level at home and abroad. Successfully helped students into Russell Group and Ivy League universities.

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### My education

#### University at Buffalo SUNY

MSc Multidisciplinary Studies (2014 - 2017)

#### Keele University

PGCE Chemistry and Science (2001 - 2002)

#### Staffordshire university

BSc Chemistry (1998 - 2001)

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### My resources

Chemistry

58 views

NotesBuffer solutions

An overview of buffers

Chemistry

60 views

NotesOzone Depletion

An overview on ozone depletion

Chemistry

47 views

Homework activityIdeal Gas Practice Calculations

Practice questions on the concept of ideal gases

Chemistry

53 views

NotesEntropy and Gibbs Free Energy

An overview of Entropy and Gibbs ree Energy

Chemistry

49 views

Biology

50 views

NotesDihybrid Crosses and Punnett Squares

Practice on producing Punnett Squares

Science

51 views

NotesAccuracy and Precision

Notes on the differences between accuracy and precision

Chemistry

40 views

NotesBuffer Solution Calculations

Helping to understand buffer solution calculations

Biology

72 views

Classroom resourcesCell Division GCSE Revision

Revision of AQA 4.1.2 Cell Division

Chemistry

58 views

NotesEnergetics Overview

An overview of Energetics

Biology

53 views

NotesWhat is DNA?

An overview of DNA

Physics

49 views

NotesSUVAT Derivation and practice

SUVAT equation practice

Maths 💯
Solve : 30 + 3x = 240?
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Subtract 30 from each side of the equation... 30 + 3x - 30 = 240 - 30 This leaves us with... 3x = 210 If we then divide each side by 3... 3x/3 = 2...Learn more

Maths 💯
Solve : 30+x=11?
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In order to make x the subject of the expression we must subtract 30 from each side of the equation... 30+x-30 = 11-30 This leaves us with... X = 1...Learn more

Chemistry ⚛️
Why is potassium more reactive than sodium?
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This is todo with the structure of the atoms. Both are in Group 1 of the periodic table so have one valence (outer) electron which is relatively eas...Learn more

Maths 💯
What’s Pythagoras?
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I assume you refer to Pythagoras’ Theorem which relates to the length of sides of a right angled triangle. It states that the sum of the squares of ...Learn more

Geography 🗺
What’s a isotope?
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Isotopes are atoms of the same element with different relative masses, that is to say the atoms have the same number of protons, the same number of ...Learn more

Biology 🌱
What is photosynthesis?
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Photosynthesis is the process by which plants produce glucose and oxygen from water and carbon dioxide in tge presence of chlorophyll and sunlight ...Learn more

Chemistry ⚛️
What is Stoichiometry in chemistry?
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Stoichiometry is the ratios of reactants and products within reactions, and often encompasses the calculation of masses, moles, volumes and/or conce...Learn more

Biology 🌱
What would happen to cells in a solution if water is added?
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This would depend on the nature of the solute, the concentration of the solution and how much water was added.

Maths 💯
How do you work out half equations in electrolysis?
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Firstly you need to know the electrolyte and thus the cation(s) and anion(s) involved. Then you know the ions will be attracted to the oppositely c...Learn more

Maths 💯
How do you work out half equations in electrolysis?
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Firstly you need to know the electrolyte and thus the cation(s) and anion(s) involved. Then you know the ions will be attracted to the oppositely c...Learn more

Chemistry ⚛️
Compare decomposition reactions with combustion reactions?
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Decomposition reactions see the reactant(s) break down into the product(s) Combustion reactions involve the reactant(s) reacting with oxygen

Chemistry ⚛️
How to calculate concentration of a solution?
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Concentration (measured in moles per litre) = amount of solute (measured in moles) divided by the volume of solution (measured in litres) The amoun...Learn more

Chemistry ⚛️
What is an element?
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In chemistry, an element is something that consists of only one type of atom.

Chemistry ⚛️
What is an acid and what is an alkali?
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The answer to your question really depends upon the level of answer that you need. At a most basic level (excuse the chemistry pun!), acids taste s...Learn more

Chemistry ⚛️
When iron oxide is heated with carbon, iron is produced. What would be the word equation for this reaction?
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Iron oxide + carbon —-> iron + carbon dioxide

Chemistry ⚛️
How does an atom of lithium form an ionic bond with an atom of chlorine?
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Lithium ‘loses’ its valence electron and forms a positive lithium cation. Chlorine ‘gains’ that electron and forms a negative chloride anion. The ...Learn more

General 🏛
Empirical formulas??
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These are the simplest whole number ratios of elements within a compound. To calculate them, you must work out the number of moles of each element w...Learn more

General 🏛
What is the empirical equation for Phosphorus Oxide (P4 O10)?
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As empirical formula is the simplest while number ratio, we take the actual ratio of 4:10 and simplify to 2:5 making the empirical form P2 O5

Maths 💯
How is the sequence -1/1, -2/4, -3/7, -4/10, -5/13 a linear sequence? How do I find the nth term from this???
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Here we can see the numerator is decreasing by one in each subsequent part of the series (-1,-2,-3,-4,etc) The denominator is increasing by 3 each t...Learn more

General 🏛
What's the best way to revise over the christmas holidays?
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Prepare a revision timetable of many, small, focussed chunks - and then stick to it!!

General 🏛
What are the groups in the periodic table?
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The groups are the vertical columns of the table. The members of each group exhibit similar properties to each other, which relate to their electron...Learn more

General 🏛
A pen costs \$t. A pencil costs half as much as a pen. A marker cost \$7 more than a pencil. A) what is the cost of the marker in terms of t? B)If the pen costs \$10, what is the cost of the marker?
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Pen = t Pencil = t/2 Marker = (t/2)+7 If t = 10, Marker = (10/2) + 7 = \$12

General 🏛
Does endothermic make the solution hot and then exothermic make it cold?
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This depends upon the reaction system that you are describing... By definition, endothermic reactions take in energy (ENdo ENters), so the reaction...Learn more

General 🏛
What is the definition of photosynthesis for GCSE?
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The process that plants undertake to produce food. Carbon dioxide and water are taken in, chlorophyll and sunlight are needed to allow the reaction...Learn more

General 🏛
In French is it right to say : je suis douze ans when I say how old I am please??
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Non! J’ai douze ans It is like saying “I have 12 years”

General 🏛
Lithium chloride is soluble in water, whereas silver chloride is not soluble in water. Suggest how this information can be used to obtain pure dry samples of lithium chloride and silver chloride from a solid mixture of the two. (3?
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(i) dissolve the mixture (ii) filter to separate the silver chloride (iii) leave both samples to dry