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lilavasa [31]
3 years ago
13

Which of the following metals will react with water to produce a metal hydroxide and hydrogen gas? (2 points)

Chemistry
2 answers:
vazorg [7]3 years ago
8 0
The answer would be the first option - k
serg [7]3 years ago
8 0

<u>Answer:</u> The correct answer is Potassium (K).

<u>Explanation:</u>

Alkali (Group 1) and Alkaline earth (Group 2) elements react with water to produce metal hydroxide and also releases hydrogen gas.

Reaction of group 1 elements with water:

2M+2H_2O\rightarrow 2MOH+H_2

Reaction of group 2 elements with water:

M+2H_2O\rightarrow M(OH)_2+H_2

From the given options:

Potassium (K): This metal belongs to Group 1 and readily reacts with water to form potassium hydroxide and hydrogen gas.

2K+2H_2O\rightarrow 2KOH+H_2

Tin (Sn): This element belongs to Group 14 and does not readily reacts with water.

Nickel (Ni): This element belongs to Group 10 and does not readily reacts with water.

Manganese (Mn): This element belongs to Group 7 and does not readily reacts with water.

Hence, the correct answer is potassium (K).

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Electrolytes are substances that produce ions when they dissolve in water.

What are electrolytes?

When some substances are dissolved in water, they undergo physical or chemical changes, creating ions in solution. These substances form an important class of compounds called electrolytes. Substances that do not release ions when dissolved are called non-electrolytes. A substance is said to be a strong electrolyte if the physical or chemical process that produces ions is inherently 100% efficient (all dissolved compounds produce ions). A solute is said to be a weak electrolyte if only a relatively small portion of the solute undergoes ion production processes.

By measuring the electrical conductivity of aqueous solutions containing substances, substances can be identified as strong, weak, or non-electrolyte. To conduct electricity, a substance must contain free-moving charged species. The best known is the conduction of electricity through metal wires. In this case, the mobile charged unit is the electron.

Therefore, Electrolytes are substances that produce ions when they dissolve in water.

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1 year ago
How do you find the percent yield of a chemical reaction?
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What is the difference between alkali metals and halogens?
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<h3>→soft and reactive metals. </h3>

Explanation:

<h3>Alkali metals are soft and reactive metals. They react vigorously with water and become more reactive. And other hand halogens are reactive non metals. ... Halogens can be solid, liquid, gaseous at room temperature and the melting point increase when they get bigger.</h3>

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Baking soda (NaHCO3) can be added to a fruit mix solution to create a carbonated drink. An example is the reaction between bakin
DanielleElmas [232]

Answer:

74.4 ml

Explanation:

          C₆H₈O₇(aq) + 3NaHCO₃(s) => Na₃C₆H₅O₃(aq + 3CO₂(g) + 3H₂O(l)

Given     15g = 15g/84g/mol = 0.1786mole Sodium Bicarbonate

From equation stoichiometry 3moles NaHCO₃ is needed for each mole citric acid or, moles of citric acid needed is 1/3 of moles sodium bicarbonate used.

Therefore, for complete reaction of 0.1786 mole NaHCO₃ one would need 1/3 of 0.1786 mole citric acid or 0.0595 mole H-citrate.

The question is now what volume of 0.8M H-citrate solution would contain 0.0595mole of the H-citrate? This can be determined from the equation defining molarity. That is => Molarity = moles solute / Liters of solution

=> Volume (Liters) = moles citric acid / Molarity of citric acid solution

=> Volume needed in liters = 0.0.0595 mole/0.80M = 0.0744 Liters or 74.4 ml

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3 years ago
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