Chapter 4, Problem 4.55PAE

### Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909

### Chemistry for Engineering Students

4th Edition
Lawrence S. Brown + 1 other
ISBN: 9781337398909
Textbook Problem

# Hydrazine, N2H4, is a weak base and can react with an acid such as sulfuric acid:   2 N 2 H 4 ( aq )   +  H 2 SO 4 ( aq )   →  2 N 2 H 5 + ( aq )   +  SO 4 − 2 ( aq ) What mass of hydrazine can react with 250. mL 0.225 M H2SO4?

Interpretation Introduction

Interpretation:

Mass of hydrazine needed to be determined.

Concept introduction:

• Equivalence point is achieved at equimolar conditions.
• Molarity measures molar concentration.

Given:

MolarityH2 SO4=0.225 MVolumeH2 SO4=250mL

Explanation

When performing calculations with molar concentration (molarity) it is much easier to change all units to moles.

Step 1: Balance Reaction

Step 2: Change all amounts to mol

molâ€‰H2SO4=MolarityÂ Ã—â€‰â€‰Volume=(0.225â€‰â€‰M)Ã—(250â€‰â€‰mL)Ã—( 1â€‰â€‰L 1000â€‰â€‰mL)molâ€‰H2SO4=0.05625â€‰â€‰â€‰mol

Step 3: Relate stoichiometry

Ratio=2:1

molâ€‰â€‰acid=2Ã—(0

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started