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madam [21]
3 years ago
14

Why you cannot add 0.3 moles of calcium fluoride directly to 1L of water to make a 0.3 M

Chemistry
1 answer:
Semenov [28]3 years ago
4 0

Answer:

Because it's not soluble in water, need to be heated acidic solution

Explanation:

Calcium Fluoride Formula: CaF2  Comprises of Ca2+ and F−

H2O = Water H+ O2- OH-

Insoluble in water

In order to dissolve a salt, you have to break apart the ions and hydrate them via a solvent.

Need to read

HSAB concept( Pearson acid-base concept) is an initialism for "hard and soft (Lewis) acids and bases"

So F- is a Halogen which is a Hard Base

And OH- is a Hard base as well

And H- is a soft base

So soft acids react best with soft bases and hard acids react best with hard bases.

Bases don't react with other bases.

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Aluminium and potassium nitrate will not react when mixed together?
Stels [109]

Answer:

they would react to make aluminum oxide and nitrogen

Explanation:

hope this helps plz mark as brainliest

7 0
2 years ago
Read 2 more answers
ubstance A undergoes a first order reaction A®B with a half-life, t½, of 20 min at 25 °C. If the initial concentration of A in a
Stells [14]

Answer : The concentration of A after 80 min is, 0.100 M

Explanation :

Half-life = 20 min

First we have to calculate the rate constant, we use the formula :

k=\frac{0.693}{t_{1/2}}

k=\frac{0.693}{20\text{ min}}

k=3.465\times 10^{-2}\text{ min}^{-1}

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 3.465\times 10^{-2}\text{ min}^{-1}

t = time passed by the sample  = 80 min

a = initial amount of the reactant  = 1.6 M

a - x = amount left after decay process = ?

Now put all the given values in above equation, we get

80=\frac{2.303}{3.465\times 10^{-2}}\log\frac{1.6}{a-x}

a-x=0.100M

Therefore, the concentration of A after 80 min is, 0.100 M

3 0
2 years ago
What is the outermost (highest-energy) shell of an element that contains electrons?
DENIUS [597]
Valence shell it contains the valence electrons e.g. the outermost electro
6 0
2 years ago
Help me I’m struggling with this one
sweet-ann [11.9K]

Answer:

Eukarya

Explanation:

It's larger than a prokaryotic cell and it has a nucleus.

3 0
2 years ago
What is the word eletrovent
djyliett [7]

Answer:

Explanation:

Electrovalent is a word often associated with chemical bonding in the field of chemistry. It is special type of bond that occurs between metals and non-metals.

These bond types are interatomic interactions occurring between two atoms to ensure that they attain stable configurations.

  • This bond type is also known as ionic bonds.
  • It occurs between two species with a large electronegative diffference i.e one specie is electropositive and the other highly electronegative.
  • The more electropositive specie is metal and it readily loses its valence electrons.
  • The electronegative non-metal gains the electrons and becomes negatively charged.
  • The electrostatic attraction between the metal and non-metals yields the electrovalent bonds.
8 0
2 years ago
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