Menu
chemistry iconPart of the Chemistry JourneyBetaJourney

Acids and Bases: From Proton Transfer to pH

Six chapters and 30 lessons, from what makes a substance an acid to a titration in the lab. You name the acid and the base in a proton transfer, write conjugate pairs, work out pH from a concentration and back, and follow a neutralization to its net ionic equation.

30 lessons30 challenges110 quiz questions

Syllabus

1 sections30 lessons30 challenges110 quiz questions

This section is part of the Chemistry Journey. The full syllabus has more sections: click any preview below to view it on the Journey page.

  1. Section 1Atomic Structure45 lessons
  2. Section 2Structure and Bonding49 lessons
  3. Section 3Stoichiometry41 lessons
  4. Section 4Oxidation and Reduction27 lessons
  5. Start sectionStartExpandCollapseAcids and bases as proton transfer: conjugate pairs, strong and weak acids, the pH scale, neutralization, titration and the acids around us.

    Acids and Bases

    6 lessons1125

    Strong and Weak

    4 lessons715

    The pH Scale

    7 lessons1330

    Neutralization

    6 lessons1125

    Acids Around Us

    4 lessons715

    Practice Problems

    3 lessons3
  6. Section 6Energy, Rates and Equilibrium35 lessons
  7. Section 7Food Chemistry and the Lab27 lessons
What you get
Everything you'll use to learn chemistry

Learn by Building

Build atoms from protons, neutrons and electrons, fill shells and orbitals, and work on a live periodic table. Every Check names the exact mistake.

Chemistry bench
Inside the atom
Build every atom from protons, neutrons and electrons, and read what the numbers on its symbol mean.A = Z + NZ = 17 protonsN = 37 - 17 = 20

Build every atom from protons, neutrons and electrons, and read what the numbers on its symbol mean.

Build Your Chemistry Streak

Stay consistent and watch your progress grow! Track your daily chemistry habit, protect your streak with freeze days, and earn rewards for showing up every day.

12 days streak

Return tomorrow to keep your streak!

fire Filled icon
left icon

January 2026

right icon

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

21

22

23

24

25

26

27

28

29

30

product Double Or Nothing icon

Double or Nothing

Day 5 of 7

fire Freeze icon

Streak Freeze

2 left

You're Not Alone

Compete on global leaderboards, invite friends to earn rewards, and celebrate each other's wins. Chemistry is better with friends!

Challenger League
Challenger LeagueTop 7 advance
leaderboard First icon1
avatar 1 icon
fire Filled icon
Alex7+ Days
2840
leaderboard Second icon2
avatar 2 icon
fire Filled icon
Jordan7+ Days
2650
leaderboard Third icon3
avatar 3 icon
fire Filled icon
Sam7+ Days
2420
4
avatar 4 icon
Casey
2180
5
avatar placeholder icon
fire Filled icon
Morgan7+ Days
1950
leaderboard Arrow Up iconPromotion zoneleaderboard Arrow Up icon

Every way to learn

Read, listen, test yourself, ask the AI about your own bench, or look up anything you've already covered. Every lesson meets you where you are.

What Everything Is Made Of
Audio

Everything around you is matter, and all matter is made of tiny particles called atoms.

A substance made of only one kind of atom is an element. There are 118 known elements.

The periodic table lists every element with its symbol: H for hydrogen, O for oxygen.

1xSarah

Earn a Certificate

Earn a certificate when you complete a section. Add it to your LinkedIn profile to show how far your chemistry has come.

CoddyCertificate of Completion
This certifies thatJohn Doehas successfully completed
chemistry iconChemistry Atomic Structure
Verified
DateJan 2026
LinkedInAdd to LinkedIn

Why learn acids and bases with Coddy

  • pH worked out, not looked up. Go from a concentration to [H3O+], pH, pOH and [OH-] and back; the board checks each value and says which one is off.
  • Proton transfer made visible. In every reaction you mark the acid that gives the H+ and the base that takes it, and write the conjugate of each.
  • Neutralization and titration in steps. Balance the equation, find the moles from a volume and a concentration, and solve for the unknown on a board that checks each step and its unit.
  • Exam-style practice. The last chapter is problems shaped like exam questions, each one a challenge you solve on a board.

Frequently asked questions about acids and bases

What does the Acids and Bases section cover?

Acids and bases as proton donors and acceptors, conjugate pairs, water as an acid and a base, strong and weak acids, the ions of water, the pH and pOH scales, neutralization and net ionic equations, salts, titration and its calculations, indicators, acid rain and antacids, with a final chapter of exam-style practice problems.

What is the difference between an acid and a base?

An acid gives a proton (H+) to another particle and a base takes one. In water an acid raises the concentration of H3O+ ions and the pH falls below 7; a base raises the concentration of OH- ions and the pH rises above 7.

How do you calculate pH?

pH is minus the logarithm of the H3O+ concentration: pH = -log[H3O+]. A 0.01 M solution of hydrochloric acid, a strong acid, has [H3O+] = 0.01 M and a pH of 2. At 25 °C pH + pOH = 14, so the pH of a base follows from its OH- concentration.

How long is the Acids and Bases section?

Six chapters and 30 lessons, each a few minutes long. Finishing it earns a free, verifiable certificate.

What's the fastest way to learn Acids and Bases?

Write Acids and Bases every day. Coddy's course is structured exactly for that: short interactive lessons, immediate exercises, and AI hints when you stall. You spend more time coding Acids and Bases than waiting on long video lectures.

Do I get a Acids and Bases certificate when I finish?

Yes. When you complete the Acids and Bases course you receive a free certificate of completion that you can share on LinkedIn or add to your resume.

Coddy programming languages illustration

Learn Acids and Bases with Coddy

Get started