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2 years ago

mixtures, solubility, and Acid/Base Solutions lesson outline lesson 2 properties of solutions answer key

1 answer:

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In chemistry, mixtures, solubility, acid/base and solutions are all important to understanding volumetric analysis and chemical reactions.

<h3>What is a mixture?</h3>

A mixture is a any substance which consists of two or more constituents which are physically combined together.

Example of a mixture is bronze.

<h3>What is solubility?</h3>

Solubility of a solute in a given solvent is defined as the amount of solute that can be dissolved in that solvent at a particular temperature.

<h3>What are acids and bases?</h3>

An acid is a substance which produces hydrogen ions or protons as the only positive ions when dissolved in water.

Example of an acid is hydrochloric acid.

A base is a substance which reacts with an acid to produce salt and water only, thereby neutralizing the acid.

Example of a base is potassium hydroxide.

<h3>What are solutions?</h3>

Solutions are homogenous mixtures of a solute dissolved in a solvent.

Example of solutions are sugar solutions and saline water.

Therefore, mixtures, solubility, acid/base and solutions are all important to understanding volumetric analysis and reactions in chemistry.

Learn more about mixtures, solubility, acid/bases and solutions at: brainly.com/question/7314699

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Convert 0.64 moles of table salt (NaCl) to grams

Nana76 [90]

Answer:

0.64 moles of table salt = 37.44 grams of table salt

Explanation:

mNaCl = 0.64 x (23 + 35.5) = 37.44 grams

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2 years ago

(a) (1)

Elis [28]

Explanation:

The ionization energy of an atom is the amount of energy that is required to remove an electron from a mole of atoms in the gas phase:

M(g) ® M+(g) + e-

It is possible to remove more electrons from most elements, so this quantity is more precisely known as the first ionization energy, the energy to go from neutral atoms to cations with a 1+ charge. The second ionization energy is the energy that is required to remove a second electron, to form 2+ cations from 1+ cations:

M+(g) ® M2+(g) + e-

The third ionization energy is the energy required to form 3+ cations:

M2+(g) ® M3+(g) + e-

and so on. Ionization energies are always positive numbers, because energy must be supplied (an endothermic energy change) to separate electrons from atoms. The second ionization energy is always larger than the first ionization energy, because it requires even more energy to remove an electron from a cation than it is from a neutral atom.

The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

From top to bottom in a group, orbitals corresponding to higher values of the principal quantum number (n) are being added, which are on average further away from the nucleus. Since the outermost electrons are further away, they are less strongly attracted by the nucleus, and are easier to remove, corresponding to a lower value for the first ionization energy.From left to right across a period, more protons are being added to the nucleus, but the number of electrons in the inner, lower-energy shells remains the same. The valence electrons feel a higher effective nuclear charge — the sum of the charges on the protons in the nucleus and the charges on the inner, core electrons. The valence electrons are therefore held more tightly, the atom decreases in size (see atomic radius), and it becomes increasingly difficult to remove them, corresponding to a higher value for the first ionization energy.

The following charts illustrate the general trends in the first ionization energy:

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3 years ago

25 L of a gas is collected at 115 kPa. If the pressure increases to 300 kPa, what is the new volume?

Lina20 [59]

Answer:

V2 = 9.58 Litres.

Explanation:

Given the following data;

Initial volume = 25 L

Initial pressure = 115 kPa

Final pressure = 300 kPa

To find the new volume V2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

$PV = K$