Balanced Equations And Aqueous Solutions Flashcards
Kc =
(C^c x D^d)/(A^a x B^B)
Unit of Kc
Doesnt Have one (Well it changes)
Diference between Qc and Kc calculations
Qc Is inital, Kc is at equalibrium
Water is a great solvent because..
Water is a great solvent because its polarity and hydrogen bonding allow it to dissolve many ionic and polar substances easily.
Unusual Properties Of Water
Very high melting and boiling points, compared to analogous molecules (Similar molecules)
Boiling is pulling particles away from each other, not pulling them apart
The freezing point of water decreases as pressure increases
A Solution is formed when..
1 or more chemical species dissolve in a liquid
A Solute is a substance that..
dissolved in a liquid, it can be solid, liquid or gas
A Solvent is a ..
liquid in which the solute dissolves
An electrolyte dissolves to give ____ in solution
Ions
NaCl, AgNO₃, and CuSO₄·5H₂O are all…
Ionic compounds and water-soluble salts
A strong electrolyte when dissolved, all the dissolved species are ions. This means
The dissociation reaction ‘goes to completion’
The H2O molecule has shape…
Bent-2
Equalibrium Constant in terms of concentration is represented by
Kc
Do Pure solids and liquids appear in equations for Kc
Nope
Are gases used for Kc calculation
Yup
If Kc >1 then..
There are more products than reactants at equilibrium. The (Equilibrium favors the products)
Slanted (M) refers to..
molarity , which is the unit of concentration in chemistry.
Molarity is calculated from formular…
M = n/v
Why is glucose considered a non-electrolyte and what holds its molecules together in a solid state
Is considered a non-electrolyte because it does not ionize in water and does not produce free ions to conduct electricity.
- Dissolution: Spontaneous in water due to favorable interactions between glucose molecules and water molecules.
When reaction is going both ways we say that its..
At equilibrium
Standard concentration is…
(1molL)^-1 sometimes written as Slanted C^0
When Kc<1
There are less products than reactants at equilibrium. The (Equilibrium favors the Reactant(s))
Melting point of water
0°C (32°F)
Ice or liquid water more dense?
Liquid (Why Ice floats)
Water has a relatively _____ surface tension and heat capacity
Large
In liquid water, the molecules move around close to each other,
continuously making and breaking hydrogen bonds with their
neighbours. (True or False)
True
Water is an weak/bad solvent for electrolytes
when dissolved. (True or false)
False (Water is a great solvent for electrolytes)
Ions, by themselves, are very high-energy species. However, solvation
helps stabilise the ions. (True or false)
True
Solvation involves interactions of the charged ions with the dipoles of the
water molecules. All ions in water are surrounded by a number of water
molecules. (True or false)
True
When water is the solvent, this is called….
Hydration
Water isn’t a good solvent for polar molecules – ones which also have polar
bonds due to large differences in electronegativity between atoms in a bond.
(True or false)
False (its a good solvent for solids and liquids like alcohols, amines, Car acids etc.)
Non-polar molecules such as O2(g) and N2(g) are generally not very soluble in
water. (True or false)
True (Although solubility isnt Zero)
Ammonia (NH3) can hydrogen-bond and is very soluble in water (True/False)
True
Weak electrolytes undergo _____ dissociation in water.
Uncomplete
Weak acids, such as acetic acid, are the classic examples of weak electrolytes.
(True or false)
True
