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Pavel [41]
3 years ago
6

Which element is classified as an alkali metal? ​

Chemistry
1 answer:
Dafna1 [17]3 years ago
7 0

Answer:

Rb

Explanation:

Alkali metals are in group 1 (the first column on the periodic table) including Li, Na, K, etc.

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Identitfy the types of reaction:
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Answer:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

AgCl + HNO3 = AgNO3 + HC - Double replacement reaction

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Explanation:

<u>Single replacement reaction</u> - The type of reaction in which one strong ion replaces the weak ion from the solution.

For example: C2H5OH + Na = C2H5ONa + H2

<u>Double replacement reaction </u>- The reaction in which two compounds in a solution reacts by interchanging their ions and forms a new product.

For example: AgCl + HNO3 = AgNO3 + HCl

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For example: N2 + H2 = NH3

<u>Decomposition reaction</u> - The type of reaction in which only one compounds break down into two or more new compounds.

For example: MgCO3 = MgO + CO2

Hence, the correct answer is:

C2H5OH + Na = C2H5ONa + H2 - Single replacement reaction

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