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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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IgorLugansk [536]

Answer:

producer to decomposer

Explanation:

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8 0
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Why is cl2 a subcript​
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Answer:

In Cl_2, the 2 is a subscript because it indicates there are 2 of the same elements. The Lewis structure would display it as Cl-Cl.

On the other hand, a superscript would indicate a specific charge.

All subscripts show the amount of the specific element there is.

An example would be O_2\\ or N_2, they both show that there are 2 of the same elements.

If the subscript is outside a parenthesis such as Ca_3(PO_4)_2 it indicates there are 2 PO_4 molecules.

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Two liquids – one polar, one nonpolar – have the same molar mass. which one has the higher boiling point?
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7 0
3 years ago
The sun’s core is made of solid rock. True or false
KengaRu [80]

Answer:

False

Explanation:

Heres what its made of:

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Amiraneli [1.4K]

Answer:

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Explanation:

The helium symbol is also used to represent he alpha particles.

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Alpha radiations can travel in a short distance.

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These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

4 0
3 years ago
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