Your chemistry textbook, remembered

For students in general chemistry I and II.

General chemistry builds on itself. Stoichiometry needs moles, equilibrium needs rates, and a chapter you half remember makes the next one harder.

The kind of question you get

Raising the temperature ___ the share of collisions with enough energy to react.

Why: more molecules have energy above the activation energy, so more collisions succeed and the reaction speeds up.

An example. Your questions come from the chapters of your own textbook.

Scan the pages you're assigned, or import your textbook's PDF. Using a free OpenStax textbook? Download its PDF and import it.
Every chapter becomes something you can finish: a short read of what matters, and the full read when you need it. In a PDF, equations stay equations.
A concept map of how the chapter's ideas affect each other.
Questions about how it works, written from each chapter, with wrong answers that are wrong for a reason.
A few minutes a day. Each question comes back just before you'd forget it, so the chapter is still there on exam day.
Listen on the way to class, with each line lit as it's read.

Refine helps you remember your textbook. It doesn't replace lectures or working the problems, and it won't do your homework.

Refine launches on October 19 on iPhone, iPad and Mac.