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3 years ago

Hey, help please. Giving BRAINLIEST!

Chemistry

1 answer:

ddd [48]3 years ago

4 0

When 0.5 moles of Zn react with 0.4 moles of HCL the limiting reactant will be HCL and excess reactant is Zn 0.3 moles excess and 0.2 moles Zn will be consumed in the reaction.

<h3>What is the limiting reactant in the given equation ?</h3>

STEP1- Write the balanced equation

Zn + 2HCL → ZnCl₂ + H₂

STEP2- calculate the moles according to the reaction

1mol of Zn requires → 2moles of HCL

0.5 moles of Zn requires→ 1mol of HCL

Given moles of HCL is 0.4

STEP3- Apply unitary method

0.5/x=1/0.4

0.5×0.4= x

0.2=x

STEP4- excess reagent left 0.5-0.2=0.3

Hence, the 0.3mole of excess Zn is left

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Write the formula of the conjugate acid of HCO₂⁻.

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Taking into account the Brønsted-Lowry acid-base theory, the conjugate acid of HCO₂⁻ is H₂CO₂.

<h3>Brønsted-Lowry acid-base </h3>

The Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.

According to this theory, acids are proton donors while bases are proton acceptors. That is, an acid is a species that donates an H⁺ proton while a base is a chemical species that accepts an H⁺ proton from the acid.

So, reactions between acids and bases are H⁺ proton transfer reactions.

<h3>Conjugate base and conjugate acid</h3>

Then, a conjugate base is an ion or molecule resulting from the acid that loses the proton, while a conjugate acid is an ion or molecule resulting from the base that gains the proton:

acid + base ⇄ conjugate base + conjugate acid

<h3>Conjugate acid of HCO₂⁻</h3>

Like a conjugate acid is an ion or molecule resulting from the base that gains the proton, the conjugate acid of HCO₂⁻ is H₂CO₂.

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