1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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.

You might be interested in
A solution of copper sulfate (CuSO4) produced by bioleaching has a concentration of 0.319 g/dm3 Relative atomic masses (Ar): Cu
Tanya [424]

moles Cu produced : 0.002

<h3>Further explanation</h3>

Concentration of copper sulfate (CuSO₄) : 0.319 g/dm³

MW CuSO₄ :

\tt =63.5+32+4\times 16=159.5~g/mol

mol CuSO₄ /dm³ :

\tt \dfrac{0.319}{159.5}=0.002

CuSO₄⇒Cu²⁺ + SO₄²⁻

mol Cu : mol CuSO₄ = 1 : 1 , so mol Cu²⁺=0.002

6 0
3 years ago
What does an aluminum atom become when it loses its three valence electrons? a?
Artist 52 [7]
Aluminum atomic number 13 becomes Neon with an atomic number of 10 when it loses three valence electrons.
6 0
3 years ago
Predict the precipitate produced by mixing an Al(NO3)3 solution with a NaOH solution. Write the net ionic equation for the react
weqwewe [10]
Al(NO3)3(aq) + 3NaOH(s) --> Al(OH)3 (s) + 3NaNO3 (aq)

The precipitate here is Al(OH)3 (s), since the solid reactant is the precipitate in the aqueous solution. Usually, it is okay to assume in basic chemistry that the transition metal is going to be part of the compound that is the precipitate, especially in an acidic salt and a strong base reaction that we have here.
4 0
3 years ago
True or false a mixture is made of two or more elements that are chemically combined
FromTheMoon [43]
False. A mixture represents elements or molecules which are not chemically combined.
5 0
3 years ago
WORTH 20 POINTS Confirmation bias is where a scientist may change the data to support a certain bias.
Orlov [11]

Answer:

True

Explanation:

Confirmation Bias is the tendency to look for information that supports, rather than rejects, one’s preconceptions, typically by interpreting evidence to confirm existing beliefs while rejecting or ignoring any conflicting data

8 0
2 years ago
Other questions:
  • Two objects are dropped into beaker with layers of oil, rubbing alcohol, water and corn syrup. These objects are made of the sam
    5·1 answer
  • State each of the following statement true or false? A. A carbon atom can form up to four covalent bonds. B. A carbon atom has s
    11·1 answer
  • Where can you find the number of electrons of an<br> element?
    13·2 answers
  • What metric measurement is similar to a mile?
    10·2 answers
  • If an electromagnetic wave has a frequency of 4.5 x 10^18 Hz, what is its wavelength? The speed of light is 3 x 108 m/s.
    7·1 answer
  • Sally's index finger is 85 mm long, how long is her index finger in decimeters?
    6·2 answers
  • (reposted) thank you :)))
    12·1 answer
  • Explain how you would find the solubility of a solute
    11·1 answer
  • What indicates that two objects are in thermal equilibrium?
    8·1 answer
  • Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!