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UWM Compounds in Solutions Strong Electrolytes & Aqueous Solution Lab Report

UWM Compounds in Solutions Strong Electrolytes & Aqueous Solution Lab Report

Question Description

Lab Report

Compounds in Solutions

Pre-lab questions:

1. Define the following terms: (3 x 0.5 ea = 1.5 pts)

a) strong electrolyte

b) weak electrolyte

c) nonelectrolyte

2. Briefly explain: (2 pts)

a) what does it mean when we say a molecule is polar?

b) what does it mean when we say a molecule is nonpolar?

Part 1: Electrolytes. Click to watch the video below, record observations and answer questions.

Electrolytes (Links to an external site.)Electrolytes

Observations and conclusions: Fill in the table: (0.25 pt ea.)

Name of each substance tested

Chemical formula of

the substance

Is the substance ionic or covalent?

Brightness of light bulb:

bright, dim or no light?

Is the substance:

strong electrolyte,

weak electrolyte,

or nonelectrolyte?

pure water
table salt
table sugar
hydrochloric acid
acetic acid


Our body fluids such as blood and sweat have dissolved ions,

a) list four major types of ions in our body fluids; (1 pt)

b) in your opinion, are our body fluids strong, weak or nonelectrolytes? (1 pt)

Part 2: Polarity of common substances: Watch the video below, record observations and answer questions.

Like dissolves like (Links to an external site.)Like dissolves like

Observations and conclusions: Fill in the table. (0.25 pt ea.)

Name of substances

Solubility in water:

Is the substane soluble or insoluble in water?

Solubility in oil:

Is the substance soluble or insoluble in oil?

Is the substance polar or nonpolar?
water N/A
food colorings
table salt
table sugar
oil N/A


1. In a few sentences explain what it means by “like dissolves like”. (1 pt)

2. A common vitamin in milk is found to be soluble in cyclohexane (cyclohexane is a substance tested in the video), but insoluble in water.

a) Is this vitamin a polar molecule or nonplolar molecule? (0.5 pt)

b) Explain. (1.5 pt)

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