The balanced equation has to be given for the reaction of hydrazine with O 2 dissolved in water. Concept Introduction: Hydrazine is a colorless liquid and is produced by oxidation of ammonia. Hydrazine is a base and is a strong reducing agent. It is used in treating waste water from chemical plants. It is also used to remove dissolved oxygen in water in electric generating plants. Hydrazine acts as a reducing agent and reduces the amount of dissolved oxygen. Otherwise, this dissolved oxygen can corrode the metals of pipes used in the plants. Balanced chemical equation of a reaction is written according to law of conservation of mass.

Question

(a) Which poisonous gas is evolved when white phosphorus is heated with Cone. NaOH solution? Write the chemical equation. (b) Write the formula of first noble gas compound prepared by N. Bartlett. What inspired N. Bartlett to prepare this compound? (c) Fluorine is a stronger oxidising agent than chlorine. Why? (d)Write one use of chlorine gas.

Answer 1

Question

Chapter 21, Problem 65PS

(a)

Interpretation Introduction

Interpretation: The balanced equation has to be given for the reaction of hydrazine with O2 dissolved in water.

Concept Introduction: Hydrazine is a colorless liquid and is produced by oxidation of ammonia. Hydrazine is a base and is a strong reducing agent.

It is used in treating waste water from chemical plants. It is also used to remove dissolved oxygen in water in electric generating plants. Hydrazine acts as a reducing agent and reduces the amount of dissolved oxygen. Otherwise, this dissolved oxygen can corrode the metals of pipes used in the plants.

Balanced chemical equation of a reaction is written according to law of conservation of mass.

(b)

Interpretation Introduction

Interpretation: It should be calculated that the mass of N2H4 needed to consume all of the dissolved oxygen in 3×104 L of water.

Concept Introduction: Hydrazine is a colorless liquid and is produced by oxidation of ammonia. Hydrazine is a base and is a strong reducing agent.

It is used in treating waste water from chemical plants. It is also used to remove dissolved oxygen in water in electric generating plants. Hydrazine acts as a reducing agent and reduces the amount of dissolved oxygen. Otherwise, this dissolved oxygen can corrode the metals of pipes used in the plants.

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Phosphoric acid, one of the acids used in some cola drinks, is produced by the reaction of phosphorus(V) oxide, an acidic oxide, with water. Phosphorus(V) oxide is prepared by the combustion of phosphorus.(a) Write the empirical formula of phosphorus(V) oxide.(b) What is the molecular formula of phosphorus(V) oxide if the molar mass is about 280.(c) Write balanced equations for the production of phosphorus(V) oxide and phosphoric acid.(d) Determine the mass of phosphorus required to make 1.00 × 104 kg of phosphoric acid, assuming a yield of 98.85%.