Chemistry flashcards

223 HSC Chemistry cards across 4 modules (64 definitions, 76 key facts, 27 fill-the-gap, 56 formulas). Each session gives you 20 cards, due cards first. Swipe right for easy, left for hard, down for again. Keyboard: Space to flip, 1 to 4 to rate.

Loading flashcards…

What this deck covers

Sample cards from this deck

Definition
Acid-base titrations and indicators explained: HSC Chemistry Module 5
Define Core formula
$n = cV$ (moles equals concentration times volume in litres), applied to the titrant first, then converted to moles of analyte using the balanced equation's mole ratio.
Definition
Buffer applications, blood pH, and Henderson-Hasselbalch explained: HSC Chemistry Module 6
Define Phosphate buffer
Phosphate buffer ( $H_2PO_4^-$ / $HPO_4^{2-}$ ): $pK_a = 7.20$ . Important inside cells where bicarbonate is less effective. Also the basis for laboratory buffers (PBS).
Definition
Alcohols, oxidation and hydration of alkenes explained: HSC Chemistry Module 7
Define Boiling point
Hydrogen bonds dominate, so alcohols boil far above alkanes of the same molar mass. Within the alcohol series, boiling point rises with chain length (more dispersion) and falls slightly with branching (less surface contact).
Definition
Designing a chemical synthesis explained: HSC Chemistry Module 8
Define Reaction conditions
Temperature, pressure, catalyst, solvent, time. Milder conditions mean cheaper, smaller, longer-lived equipment and lower energy cost.
Definition
Brønsted-Lowry acid-base theory explained: HSC Chemistry Module 5
Define One proton, no more
A conjugate acid and its conjugate base differ by exactly one $H^+$ ; never balance a "pair" that differs by two protons or by a non-hydrogen atom.
Definition
Conjugate acid-base pairs (Ka, Kb, Kw relationship) explained: HSC Chemistry Module 6
Define Cation from a strong base
Cation from a strong base (Na+, K+, $Ca^{2+}$ , $Ba^{2+}$ ): spectator, no hydrolysis.
Definition
Aldehydes, ketones and carboxylic acids explained: HSC Chemistry Module 7
Define Boiling point trend
Boiling point trend (same carbon number): alkane < aldehyde/ketone < alcohol < carboxylic acid.
Definition
Colourimetry, UV-vis and AAS explained: HSC Chemistry Module 8
Define Absorbance definition
$A = \log_{10}(I_0 / I)$ , comparing incident intensity $I_0$ to transmitted intensity $I$ .
Definition
Buffer systems explained: HSC Chemistry Module 5
Define Adding $H^+$
The conjugate base neutralises it: $CH_3COO^- + H^+ \rightarrow CH_3COOH$ . Equilibrium shifts left. The pH drops only slightly.
Definition
Dilution, concentration units and pH on dilution explained: HSC Chemistry Module 6
Define Dilution
$c_1V_1 = c_2V_2$ (moles of solute conserved; both volumes in the same unit).