Uni-Sine
Scottish exams
Scottish examsNational 5

National 5 Chemistry data booklet: relationships and data, and what you must know

Published 6 min read

Paper resets in

Formula sheet

The card below opens today's National 5 Chemistry paper with the booklet's relationships and data in the drawer, and our periodic table. The relationships and a summary of the tables follow in our own layout. The values themselves are in the official booklet, published in January 2026, which you should use for any number.

Formula sheet

National 5 Chemistry

Open formula sheet

Relationships

E_h=cm\Delta Theat energy to change the temperature of a liquid
n=cVmoles from concentration and volume
n=\frac{m}{\text{GFM}}moles from mass
\frac{c_1V_1}{n_1}=\frac{c_2V_2}{n_2}titration: the volumes and concentrations of two solutions
\text{average rate}=\frac{\Delta\text{quantity}}{\Delta t}average rate of a reaction
\%\ \text{by mass}=\frac{m}{\text{GFM}}\times100percentage by mass

Specific heat capacity of liquid water

Data in the booklet

TableWhat it gives
Periodic tableNames, symbols, atomic numbers and relative atomic masses, in columns and periods
Melting and boiling points of selected elementsIn degrees Celsius
Electron arrangements of main group elementsThe arrangement for each element
Flame coloursThe colour a metal compound gives a flame
Names, symbols, relative atomic masses, densities and dates of discoveryOne row per element
Formulae of selected ions with more than one kind of atomSuch as the formula and charge of a compound ion
Solubilities of selected compounds in waterWhich combinations of ions dissolve
Melting and boiling points of selected inorganic compoundsIn degrees Celsius
Melting and boiling points of selected organic compoundsIn degrees Celsius
Electrochemical seriesReduction reactions, in order

What is not in the National 5 Chemistry data booklet

  • What the symbols mean. GFM is the gram formula mass. The booklet does not define it, so learn it.
  • Units. Concentration is in mol/l and volume must be in litres for n = cV. Convert cm³ to litres.
  • Which one to use. There are two ways to find moles, from mass and from concentration and volume. Choose by what the question gives.
  • Rearranging. n = m ÷ GFM is printed once, so you rearrange it for the mass or the GFM.
  • Chemistry beyond the six relationships. Percentage yield, enthalpy changes, equilibrium constants and Avogadro's constant are not in the National 5 booklet.
  • The meaning of the data. A table of solubilities does not explain precipitation. You still need to know how to write ionic equations and what a precipitate is.

The course specification says a data booklet containing relevant data and formulae is provided.

How the paper uses the booklet

The course specification gives the question paper 80 marks and 2 hours, in two sections: 20 marks of multiple choice and 60 of written answers. The assignment is 20 marks. In the 2027 timetable the exam is on Friday 21 May from 13:00 to 15:00 (Exam Timetable 2027, version 02). Our National 5 Chemistry guide covers the course and the grades.

Using the booklet under exam pressure

  1. Read what the question gives and what it wants, and convert units.
  2. Pick the relationship, write it down and substitute.
  3. Use the periodic table for relative atomic masses, and the other tables only when the question points to them.
  4. Give the answer with its unit, and check it is a sensible size.

Moles from concentration and volume

How many moles of solute are in 40 cm³ of a 0.25 mol/l solution? Convert the volume first: 40 cm³ = 0.040 l.

n=cV=0.25\times0.040=0.010\ \text{mol}

Check it the other way round in the Molarity Calculator, which gives 0.25 mol/l.

Moles from mass

How many moles are in 5.85 g of sodium chloride? The GFM is 23 + 35.5 = 58.5 g, with the relative atomic masses of sodium and chlorine taken from the periodic table.

n=\frac{m}{\text{GFM}}=\frac{5.85}{58.5}=0.100\ \text{mol}

Titration

20.0 cm³ of 0.10 mol/l sodium hydroxide is neutralised by hydrochloric acid of concentration 0.050 mol/l. The equation has a 1 : 1 ratio, so n₁ = n₂ = 1:

V_2=\frac{c_1V_1}{c_2}=\frac{0.10\times20.0}{0.050}=40\ \text{cm}^3

Average rate of reaction

A reaction produces 40 cm³ of gas in 25 s, so the average rate is 40 ÷ 25 = 1.6 cm³/s. Practise using relative atomic masses in the Atomic Structure course, then press Mark.

Work out the relative atomic mass of an element from its isotopes and their abundances.

Press Mark to have your answer marked in the Atomic Structure course.

Heat energy

How much heat raises the temperature of 0.25 kg of water by 20 °C? The booklet gives c = 4.18 kJ kg⁻¹ °C⁻¹:

E_h=cm\Delta T=4.18\times0.25\times20=20.9\ \text{kJ}

Exam answers

The answers and a worked mark scheme come with today's paper once it is marked. Sit the paper with the sheet open beside you, mark it, and the worked answers show which line each question wanted. We do not publish official or past paper answers.

Use the sheet with today's paper

Uni-Sine publishes a free daily paper for National 5 Chemistry. It is a short timed paper of 8 questions worth 25 to 35 marks, not a full SQA paper and not set by SQA. Many schools set a longer prelim in winter: see our prelims guide. Open the sheet, set a timer, and write the line you use at the start of each answer.

Common mistakes

  • Forgetting to convert cm³ to litres. Divide by 1000 before using n = cV.
  • Forgetting the units in GFM. Quote GFM in grams.
  • Using the wrong mass for c. The specific heat capacity is per kilogram, so change grams to kilograms.
  • Ignoring the mole ratio in a titration. Use n₁ and n₂ from the balanced equation.
  • Quoting a rate with no unit. Say cm³/s, g/s or mol/l/s as the question requires.

Common questions

Do you get a data booklet in National 5 Chemistry?
Yes. The course specification says a data booklet containing relevant data and formulae is provided with the question paper.
What relationships are in the National 5 Chemistry data booklet?
E_h = cmΔT, n = cV, n = m ÷ GFM, c₁V₁ ÷ n₁ = c₂V₂ ÷ n₂, average rate = change in quantity ÷ change in time, and percentage by mass.
Is the periodic table in the National 5 data booklet?
Yes. The booklet has the periodic table and several data tables, such as melting and boiling points and the electrochemical series.
Is percentage yield in the National 5 data booklet?
No. It is not one of the booklet's six relationships.
Where can I read the official booklet?
On the Qualifications Scotland website. The January 2026 edition is the current one.

Revision cards

Say the answer first, then flip the card to check it.

Where to go next

  • Solve it

    Molarity Calculator

    Find concentration from mass, moles and volume

    Open the tool
  • Learn it

    Atomic Structure

    Electron shells, orbitals and the periodic table: the foundation of all chemistry

    Start the course
  • Test it

    National 5 Chemistry

    A new exam-style paper every day, with instant marking and a mark scheme

    Start today's paper
Read next
Scotland · National 5National 5 Chemistry: 2027 Exam Guide and PracticeNational 5 Chemistry explained: the new 80-mark, 2-hour exam for 2027, the assignment, the data booklet, 2026 grade boundaries and worked questions.