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Sugar and salt lab chemistry

Sugar and salt lab chemistry

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Name____________________________________ Date___________

Sugar and Salt Solutions PhET – Introduction to Solutions

Goal: you will be able to

1). Compare and contrast the behavior of molecular compounds and chemical salts in water.

2). Provide evidence to classify molecular compounds and chemical salts as either as

electrolytes or non electrolytes

3). Draw particle diagrams that represent aqueous solutions of chemical salts in water and

molecular compounds in water

4). Propose an explanation of the behavior of the conductivity tester in the salt and sugar

solutions.

Getting Familiar with the Program – Macro Screen

• Take a moment to play

with the controls before moving on to the procedure!

• Select the Reset All button before proceeding

Shaker

dispense

sugar

and salt

Toggle between

sugar and salt

Provides the

number of

particles in

solution

Place this in the

solution to

determine

conductivity

Removes water

from the beaker

Reset

Button

Evaporates water

from the beaker

Adds water from

the beaker

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Procedure

• Make sure the solute is selected to salt

1). Pick up the conductivity tester and place it in the water in the beaker. Record your initial

observations of the behavior of the light bulb in the water.

Nothing happened and the light bulb did not light up.

_______________________________________________________________________

2). Do 1 shake of salt into the water. What do you observe about the light bulb?

___________The light bulb showed little rays coming from it.

____________________________________________________________

_______________________________________________________________________

3). Add another shake into the water. Record your observations.

Looked the same.

_______________________________________________________________________

4). Add additional shakes of salt into water. Continue to record your observations.

________It looked like the light coming out was brighter.

_______________________________________________________________

_______________________________________________________________________

There are three variables for you to consider.

• Adding water • Removing water • Evaporating water

Select one variable and record it in the space provided

Variable: _adding water____________________

Proceed with adjusting this variable and record the observation of the light bulb.

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Name____________________________________ Sugar and Salt Solutions PhET – Introduction to Solutions Date___________ Goal: you will be able to 1). Compare and contrast the behavior of molecular compounds and chemical salts in water. 2). Provide evidence to classify molecular compounds and chemical salts as either as electrolytes or non electrolytes 3). Draw particle diagrams that represent aqueous solutions of chemical salts in water and molecular compounds in water 4). Propose an explanation of the behavior of the conductivity tester in the salt and sugar solutions. Getting Familiar with the Program – Macro Screen Adds water from the beaker Shaker to dispense sugar and salt Provides the number of particles in solution Toggle between sugar and salt Place this in the solution to determine conductivity Evaporates water from the beaker • Reset Button Removes water from the beaker • Take a moment to play with the controls before moving on to the procedure! Select the Reset All button before proceeding 1 Procedure • Make sure the solute is selected to salt 1). Pick up the conductivity tester and place it in the water in the beaker. Record your initial observations of the behavior of the light bulb in the water. Nothing happened and the light bulb did not light up. _______________________________________________________________________ 2). Do 1 shake of salt into the water. What do you observe about the light bulb? ___________The light bulb showed ...
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