AP Chemistry Unit 1-4 Quick Flashcard 1

Front

What is a conjugate acid-base pair?

Back

A conjugate acid-base pair consists of two species that differ by the presence or absence of a proton (H+). For example, HCl (acid) and Cl- (conjugate base) are a conjugate pair.

Front

Which element has the largest atomic radius: Li, B, Ne, or N?

Back

Lithium (Li) has the largest atomic radius among these elements.

Front

What is the oxidation number of oxygen in OF2?

Back

The oxidation number of oxygen in OF2 is +2.

Front

What is the solubility of KBr at 80°C?

Back

The solubility of KBr at 80°C is 100 g per 100 mL of water.

Front

What is the shape of a molecule with a trigonal planar geometry?

Back

A trigonal planar molecule has three bonds arranged in a flat plane around a central atom, with bond angles of 120°.

Front

Define the term 'atomic radius'.

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the trend in atomic radius across a period in the periodic table?

Back

Atomic radius decreases across a period from left to right due to increasing nuclear charge.

Front

What is the trend in atomic radius down a group in the periodic table?

Back

Atomic radius increases down a group due to the addition of electron shells.

Front

What is the definition of solubility?

Back

Solubility is the maximum amount of a solute that can dissolve in a given amount of solvent at a specific temperature.

Front

What is the significance of oxidation numbers in redox reactions?

Back

Oxidation numbers help track the transfer of electrons in redox reactions, indicating which species are oxidized and reduced.