Titration and solution stoichiometry
Practice Flashcards
Flip to reveal answersWhat is a titration?
Track your progress — Sign up free to save your progress and get smart review reminders based on spaced repetition.
All 12 Flashcards — Titration and solution stoichiometry
Sign up free to track progress and get spaced-repetition review schedules.
Question
What is a titration?
Answer
A precise technique to find an **unknown concentration** by reacting it with a **standard solution** to the **end point** (an indicator colour change).
Question
What is a standard solution?
Answer
A solution of **precisely known concentration**, made up in a **volumetric flask**.
Question
What does a pipette do in a titration?
Answer
Delivers a **fixed, exact** volume of the solution being analysed (e.g. 25.0 cm³).
Question
What does a burette do in a titration?
Answer
Delivers the **variable** volume of titrant (the **titre**), read to ±0.05 cm³.
Question
What is the formula linking amount, concentration and volume?
Answer
$n = CV$ — amount (mol) = concentration (mol dm⁻³) × volume (**dm³**). Given in the data booklet.
Question
What are the three steps of a titration calculation?
Answer
**(1)** n = CV on the known reagent → mol. **(2)** Cross by the **mole ratio**. **(3)** C = n/V (or M = m/n) on the unknown.
Question
Why must the titre be converted before using n = CV?
Answer
The volume must be in **dm³** — divide a cm³ titre by **1000** first.
Question
What are concordant titres?
Answer
Titres that **agree** (typically within 0.10 cm³). Only the concordant titres are **averaged** — a rough trial is ignored.
Question
What is a back titration?
Answer
Add a **known excess** of a reagent, let it react, then titrate the **leftover** excess. Amount reacted = **added − leftover**.
Question
When is a back titration used?
Answer
When the reaction is **slow** or the sample is an **insoluble solid** (e.g. a carbonate), making a direct titration impractical.
Question
Mole ratio of NaOH to H_{2}SO_{4} in neutralisation?
Answer
**2 : 1** — sulfuric acid is diprotic, so it needs **two** moles of NaOH per mole of acid.
Question
Commonest dropped mark in a titration calculation?
Answer
Forgetting the **mole ratio** from the balanced equation, or leaving a volume in **cm³** instead of dm³.
Read the notes
Full study notes for Titration and solution stoichiometry
Topic 5.1 hub
How much? The amount of chemical change
More from Topic 5.1
All flashcards in this topic
Chemistry exam skills
Paper structures & tips
Track your progress with spaced repetition
Sign up free — Aimnova tells you exactly which cards to review and when, so you remember everything before your IB exam.
Start Free