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baherus [9]
3 years ago
10

Enter a balanced chemical equation for the reaction between potassium metal and liquid water.

Chemistry
1 answer:
Oksanka [162]3 years ago
6 0

Answer:

  • 2K (s) + 2H₂O (l) → 2KOH (aq) + H₂(g)↑

Explanation:

<u>1) Word equation (given)</u>

  • Potassium + water → ?

<u>2) Kind of reaction</u>

  • <em>Potassium</em> is an alkali metal.

This is a single replacement reaction.

Alkali metals is the group of metals in the group 1 of the periodic table. These are the most active metals, meaning that they react violently with water releasing hydrogen gas.

  • Alkali metals can lose an electron to form compounds with oxidation number +1.

  • The general equation for the reaction of an alkali metal and water is:

         Metal + Water → hydroxide + gaseous hydrogen

            X + H₂O → XOH(aq) + H₂ (g) ↑

<u>3) Chemical equation</u>

  • K (s) + H₂O (l) → KOH(aq) + H₂(g)↑

<u>4) Balance</u>

  • 2K (s) + 2H₂O (l) → 2KOH(aq) + H₂(g)↑

There is the same number of each atom on both sides: 2 K in the left and in the right, 4 H in the left and in the right, and 2 oxygen in the left and in the right. So, the equation is balanced.

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Draw lewis formula and structural formula of hydrogen ion please and thank you
tresset_1 [31]

The Lewis formula refers to a diagram showing the distribution of electrones and in case of a molecule it also shows the bonds.

The structural formula on the other hand is a representation of the molecular structure that shows all the atoms that form the molecule, arranged in a three dimentional space,

In this case we have the hydrogen ion, which is the simpliest case we can have.

Hydrogen ion is the hydrogen atom possitively charged as it has lost his electron. Therefore the structural formula is simply the following:

The Lewis formula is also very simple as this ion has no electrons and has no bonding to other atoms:

4 0
1 year ago
What is the charge on an atom after it loses an electron during the formation of a bond?
NARA [144]

Answer:

One positive charge

Explanation:

In a neutral atom, the number of positive and negative particles are equal. This leaves the atom with a net charge of zero, 0.

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The number of electrons lost or gained determines the charge.

7 0
3 years ago
What is not true about most combustion reactions? a) elemental carbon is a product b) energy is released c) a carbon-based fuel
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8 0
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7 0
2 years ago
The mass defect for the formation of lithium-6 is 0.0343 g/mol. The binding energy for lithium-6 nuclei is ________ kJ/mol. Ente
Sholpan [36]

<u>Answer:</u> The binding energy for lithium-6 nuclei is 3.09 E+11

<u>Explanation:</u>

Binding energy is defined as the energy which holds the nucleus together. It is basically the product of mass defect and the square of the speed of light.

This energy is calculated by using Einstein's equation, which is:

E=\Delta mc^2

where,

E = Binding energy of the atom

Delta m = Mass defect = 0.0343g/mol = 0.0343\times 10^{-3}kg/mol     (Conversion factor: 1kg=10^3g )

c = speed of light = 3\times 10^8m/s

Putting values in above equation, we get:

E=0.0343\times 10^{-3}kg/mol\times (3\times 10^8m/s)^2

E=3.09\times 10^{14}J/mol=3.09\times 10^{11}kJ/mol     (Conversion factor: 1kJ=10^3J )

Hence, the binding energy for lithium-6 nuclei is 3.09 E+11

7 0
2 years ago
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