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Chapter 4: 4.59P (page 180)

Is the following a redox reaction? Explain

NH3(aq)+HCl(aq)鈫�NH4Cl(aq)

Short Answer

Expert verified

No, this is not a redox reaction.

Step by step solution

01

Definition of redox reaction

Oxidation-reduction (or redox) reactions are a type of chemical reaction in which the net movement of electrons from one reactant to the other occurs.

Such movement of electron charge occurs in the formation of both ionic and covalent compounds.

Or we can say that a reaction in which one compound oxidizes and the other is reduced simultaneously in the same reaction and elements change their oxidation state in a chemical reaction are known as redox reactions.

Example: 2Mgs+O2g鈫�2MgOs

02

Determine the types of reaction when ammonia reacts with hydrochloric acid

NH3aq+HClaq鈫�NH4Claq

No, this is not a redox reaction because in the redox reaction two or more elements must change their oxidation states.

In the above reaction there is no change in oxidation state of the elements. Consequently there is no net movement of electrons in the above reaction.

This is a neutralization reaction between an acid and a base.

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Most popular questions from this chapter

In a combination reaction, 1.62 g of lithium is mixed with 6.50 g of oxygen.

(a) Which reactant is present in excess?

(b) How many moles of product are formed?

(c) After reaction, how many grams of each reactant and product are present?

Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:

aHIg鈫�H2g+I2g

bZns+AgNO3aq鈫�ZnNO32aq+Ags

cNOg+O2g鈫�N2O4l

For the following aqueous reactions, complete and balance the molecular equation and write a net ionic equation:

(a) Manganese(II) sulfide + hydrobromic acid

(b) Potassium carbonate + strontium nitrate

(c) Potassium nitrite + hydrochloric acid

(d) Calcium hydroxide + nitric acid

(e) Barium acetate + iron(II) sulfate

(f) Zinc carbonate + sulfuric acid

(g) Copper(II) nitrate + hydrosulfuric acid

(h) Magnesium hydroxide + chloric acid

(i) Potassium chloride + ammonium phosphate

(j) Barium hydroxide + hydrocyanic acid

Balance each of the following redox reactions and classify it as a combination, decomposition, or displacement reaction:

aCas+H2Ol鈫�CaOH2aq+H2g

bNaNO3s鈫�NaNO2s+O2g

cC2H2g+H2g鈫�C2H6g

There are various methods for finding the composition of an alloy (a metal-like mixture). Show that calculating the mass % of Mg in a magnesium-aluminum alloy (d = 2.40 g/cm3) gives the same answer (within rounding) using each of these methods:

(a) a0.263-gsampleofalloy(dofMg=1.74g/cm3;dofAl=2.70g/cm3);

(b) an identical sample reacting with excess aqueous HCl forms 1.38x10-2molofH2;

(c) an identical sample reacting with excess O2 forms 0.483 g of oxide.
See all solutions

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