What is the third guiding question in systematic problem solving?

Decide how to move from known information to the goal.

Think of this like a map for solving a problem: you look at what you already know and figure out the steps that will get you to the answer. Start by writing down the facts, then ask what you need to find, and then pick a path — maybe an equation, drawing, or converting units — that connects the two. If something seems tricky, break it into smaller steps and solve each one in order. Taking a moment to plan your approach saves time and prevents mistakes.

A common mistake is jumping straight into calculations without a plan, which often leads to wrong work or wasted time, so take a moment to outline your steps before you start. Another mistake is choosing the wrong method, like trying to use a complicated formula when a simple one will do, so check whether a basic relation or diagram can connect your knowns to your unknowns. Students also sometimes forget to convert units or keep track of what they are solving for, so write the goal clearly at the top and keep units written with numbers.

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How to Plan Problem Solving in Chemistry

1. Write down known facts
2. Identify what you need
3. Pick a connecting method
4. Use equations or drawings
5. Convert units if needed
6. Break into smaller steps
7. Solve each step in order

Common Chemistry Problem-Solving Mistakes

1. Starting calculations without a plan
2. Choosing an overly complex method
3. Forgetting unit conversions or goals

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