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3 years ago

Which equation represents a double replacement reaction

Chemistry

2 answers:

jek_recluse [69]3 years ago

7 0

LiOH+HCL LiCL+H2O represents a double replacement reaction.

ryzh [129]3 years ago

5 0

Options

(1) 2Na + 2H2O → 2NaOH + H2

(2) CaCO3 → CaO + CO2

(3) LiOH + HCl → LiCl + H2O

(4) CH4 + 2O2 → CO2 + 2H2O

Answer:

(3) LiOH + HCl → LiCl + H2O

Explanation:

A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.

A typical example is given as;

AB + CD --> BC + AD

The only reaction that matched the axample given in the options is that of option C,

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Explanation:

The balanced Chemical equation for reaction between zinc and sulfuric acid is :

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pH value 1 represents a solution with the lowest OH⁻ion concentration.

<u>Explanation:</u>

pH is given by the expression as the negative logarithm to the base 10 of the concentration of hydrogen ions.

pH = -log₁₀[H⁺]

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