🧪

Virtual Lab: Acids & Alkalis

Mini-lab • Three experiments • Earn your lab report

🌈
Station 1
pH Test
⚗️
Station 2
Titration
💎
Station 3
Make a Salt

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Virtual LabAcids & Alkalis Mini-Lab

Pick a station

Do them in any order. Once all three are complete, your lab report unlocks.

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Station 1 • ~10 min
🌈

pH Investigation

Test 8 household substances with universal indicator. Classify each as acid, neutral, or alkali.

8 substances Start →
Station 2 • ~12 min
⚗️

Titration

Neutralise an unknown alkali with hydrochloric acid using phenolphthalein indicator. Find the concentration.

2 titrations + calc Start →
Station 3 • ~10 min
💎

Make a Salt

Make copper chloride from copper oxide + hydrochloric acid. Filter and evaporate to grow crystals.

5 stages Start →
Lab Report
📄

Your Lab Report

A printable A4 write-up of all three experiments — your name, your data, your conclusions.

Complete all 3 stations to unlock 🔒 Locked
1
pH Investigation
Aim: find out the pH of 8 household substances and classify them.
1Hypothesis
2Predict
3Investigate
4Graph
5Conclude
🤔
Before we test anything, write a hypothesis.What do you THINK we'll find when we test 8 household substances?

My hypothesis

Stuck? Click one of the boxes below to use it. You can also edit it or type your own.

Choose a hypothesis to start with
Most will be acidic
Most will be alkaline
A mix of acid, neutral, alkali
All near neutral
🎯
Predict where each substance belongs.Click a substance, then click the box you think it'll fall into.

Sort each substance into a category

Tap a substance in the pool below, then tap the column where you predict it goes. You can move them around — nothing is locked in.

Substances (tap one, then a column)
🍋 Acid (pH <7)
💧 Neutral (pH 7)
🧼 Alkali (pH >7)
🧪
First, add universal indicator to the test tube.Click the green dropper bottle (top right of the bench).
UI
Universal
Indicator
Test tube(empty)
Universal Indicator pH chart
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3
5
7
9
11
13
← acidneutralalkali →
👆 First, click the Universal Indicator dropper bottle to set up your test tube.

Your results so far (0 / 8)

SubstanceColourpHType
No results yet
📊
Here's your data as a bar chart.Each bar is a substance. The colour shows acid (red), neutral (green), or alkali (blue).

Bar chart: pH of each substance tested

Y-axis = pH (0–14). The dashed line at pH 7 is neutral.

Acid Neutral Alkali
✍️
Write a conclusion about what you found.Click the yellow sentence-starters to help you build it.

My conclusion

Click a starter to insert it. Then finish the sentence.

Sentence starters

Aim for 2–3 sentences.

2
Titration
Aim: find the concentration of an unknown alkali using hydrochloric acid.
1Hypothesis
2Predict
3Investigate
4Graph
5Conclude
🤔
Form a hypothesis about the unknown alkali.The acid is 0.1 mol/dm³. What do you think the alkali's concentration will be?

My hypothesis

Pick one to start, then add your reasoning.

Choose a hypothesis
Less concentrated
About the same
More concentrated
🎯
Predict how much acid you'll need.The flask holds 25 cm³ of alkali. The burette holds 50 cm³ of 0.1 mol/dm³ acid.

My prediction: titre (cm³)

Tap one option.

Choose your prediction
About 10 cm³
About 20 cm³
About 25 cm³
About 40 cm³
More than 50 cm³
Hint: If they were the SAME concentration, the titre would be exactly 25 cm³ (because the flask has 25 cm³ of alkali).
⚗️
Do the titration twice.Open the tap until the pink fades, then dropwise. Press Record titre when the flask is colourless. Repeat for accuracy.
0 10 20 30 40 50 0.1 mol/dm³ HCl
Burette reading 0.0 cm³
25 cm³ NaOH(aq) + phenolphthalein
Start the titration by opening the tap. Stop when the pink colour fades.
Volume of acid (cm³)
Titration 1 (rough)—
Titration 2 (accurate)—
Average titre—

📐 Calculation: concentration of the alkali

Fill in the gaps. Use your average titre.

Concentration of alkali = (Average titre × 0.1) ÷ 25

= ( × 0.1) ÷ 25

= mol/dm³

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Here's your data as a bar chart.If your two titrations are close together, the result is reliable.

Bar chart: your two titrations and the average

Y-axis = volume of acid (cm³). Closer bars = better repeatability.

✍️
Write a conclusion about what you found.Click a yellow starter to insert it. Aim for 2–3 sentences.

My conclusion

Sentence starters
3
Making a Salt
Aim: make copper chloride crystals from copper oxide and hydrochloric acid.
1Hypothesis
2Predict
3Investigate
4Graph
5Conclude
🤔
Form a hypothesis about the reaction.You'll add black copper oxide to hydrochloric acid. What do you THINK will happen?

My hypothesis

Pick a starting point. You can edit or type your own.

Choose a hypothesis
Nothing will happen
Solution will turn blue
It will fizz
It will get hot
🎯
Predict the colour of the final crystals.The salt we're making is copper chloride (CuCl₂).

My prediction: colour of the crystals

Tap one option.

Choose your prediction
⚪ White
🟦 Blue
🟢 Blue-green
🩷 Pink
⚫ Black
Hint: Most copper compounds are blue or blue-green. (Think of copper roofs going green over time — that's a copper salt!)
🔬
Work through the 5 stages.At each stage: do the action, write what you saw, then rate how blue the solution is.
Stage 1 — Warm the acid Click the Bunsen to warm 25 cm³ of dilute hydrochloric acid in a beaker. Warming speeds the reaction. (Don't boil it!)
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2
3
4
5
very paledeep blue
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Here's your colour-intensity data as a bar chart.The blue should grow stronger from stage 1 to stage 4, then drop at stage 5 (crystals — water gone).

Bar chart: blue intensity through each stage

Y-axis = how blue (1–5). Each bar is one stage.

✍️
Write a conclusion about making copper chloride.Click a yellow starter to insert it.

My conclusion

Sentence starters
📄 Your lab report — preview
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