What to Put in Your Calculator for Ap Chem

AP Chemistry Calculator Requirements

The College Board specifies that you must use a graphing calculator for the AP Chemistry exam. Your calculator must meet these requirements:

• Graphing capability
• Ability to store and recall programs
• Ability to perform matrix operations
• Ability to perform statistical calculations
• Ability to perform logarithmic and exponential calculations

Popular approved calculators include the TI-84 Plus CE, TI-83 Premium, and TI-89. The College Board provides a list of approved calculators on their website.

Essential Formulas to Memorize

While your calculator can perform complex calculations, you'll need to memorize certain formulas that are frequently tested:

You should also be familiar with the periodic table, common chemical formulas, and conversion factors.

Calculator Setup Guide

Proper calculator setup can save you time during the exam. Here's what to include:

1. Store Essential Constants

Store frequently used constants in your calculator's memory:

• Avogadro's number (6.022 × 10²³ mol⁻¹)
• Gas constant (R = 0.0821 L·atm/mol·K or 8.314 J/mol·K)
• Standard temperature and pressure (STP) conditions (0°C, 1 atm)
• Common molar masses (e.g., H₂O, CO₂, NaCl)

2. Program Useful Equations

Program equations you'll use frequently:

• Ideal Gas Law (PV = nRT)
• Gibbs Free Energy (ΔG = ΔH - TΔS)
• Standard Molar Entropy (ΔS°)
• pH calculations (pH = -log[H⁺])

3. Create Conversion Tables

Store conversion factors for common units:

• Temperature (C to K, F to C)
• Pressure (atm to torr, mmHg to kPa)
• Volume (L to mL, m³ to L)
• Energy (J to kcal, kJ to J)

4. Save Common Chemical Formulas

Store formulas for common compounds:

• Water (H₂O)
• Carbon dioxide (CO₂)
• Sodium chloride (NaCl)
• Sulfuric acid (H₂SO₄)

Exam Tips and Common Mistakes

1. Time Management

AP Chemistry is a timed exam, so practice working quickly and accurately. Allocate time for each section and question type.

2. Unit Conversions

Pay close attention to units in problems. Make sure your calculator is set to the correct unit system (SI units are preferred).

3. Significant Figures

Remember to round your final answers to the correct number of significant figures based on the given data.

4. Formula Memorization

Don't rely solely on your calculator for formulas. Memorize the essential ones listed above.

5. Common Mistakes to Avoid

• Mixing up similar formulas (e.g., ΔH vs ΔG)
• Incorrect unit conversions
• Forgetting to include the correct number of significant figures
• Misplacing decimal points in scientific notation
• Not double-checking your work