Lab Molarity - Revision history

Bes at 13:59, 21 March 2020

2020-03-21T13:59:49Z

2020-03-20T15:29:37Z

Example 7

2020-03-20T15:26:28Z

Example 7

2020-03-20T15:25:00Z

Example 6

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Example 6

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Example 6

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Example 6

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Section 4.5: Concentration of Solutions

2020-03-20T14:53:45Z

Example 4

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Example 5

@@ Line 1: / Line 1: @@
-Welcome to your "sort of" first online lab. I would like to use this first lab activity to cover some additional lecture material and then follow it up with a short activity.
+Welcome to your "sort of" first online lab. I would like to use this first lab activity to cover some additional lecture material and then follow it up with a short activity in "lecture" on Weds.
 ==Section 4.5: Concentration of Solutions==
@@ Line 54: / Line 54: @@
 <div align="right"> Answer = 37.6 grams NaCl</div>
-<div align="center"> '''Now go to WebAssign and complete HW4.2 spring 2020 (Molarity)'''</div>
+<div align="center"> '''Now go to WebAssign and complete HW4.2 spring 2020 (Molarity) ,<-- not available until Mon at 9 am'''</div>
 END of "not" Lab :)

← Older revision		Revision as of 15:29, 20 March 2020
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	<div align="right"> Answer = 37.6 grams NaCl</div>		<div align="right"> Answer = 37.6 grams NaCl</div>
		+
		+	<div align="center"> '''Now go to WebAssign and complete HW4.2 spring 2020 (Molarity)'''</div>
		+
		+	END of "not" Lab :)

← Older revision		Revision as of 15:26, 20 March 2020
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	::::<write it out>...this is an extension of the problem above...first calculate moles then grans...		::::<write it out>...this is an extension of the problem above...first calculate moles then grans...

−	<div align="~~center~~"> Answer = ~~XXX~~ grams NaCl</div>	+	<div align="right"> Answer = 37.6 grams NaCl</div>

← Older revision		Revision as of 15:25, 20 March 2020
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	::::<write it out>...here is how i did it...		::::<write it out>...here is how i did it...

−	<div align="center"> [[File:IMG_0293.jpg\|400px]]l</div>	+	<div align="center"> [[File:IMG_0293.jpg\|400px]]</div>
		+
		+	====Example 7====
		+	:How many grams of NaCl are in 1.234 L of a 0.521 M NaCl solution? (''...follow the units...'')
		+	::::<write it out>...this is an extension of the problem above...first calculate moles then grans...
		+
		+	<div align="center"> Answer = XXX grams NaCl</div>

← Older revision		Revision as of 15:19, 20 March 2020
Line 46:		Line 46:
	::::<write it out>...here is how i did it...		::::<write it out>...here is how i did it...

−	<div align="~~right~~"> [[File:IMG_0293.jpg\|400px]]l</div>	+	<div align="center"> [[File:IMG_0293.jpg\|400px]]l</div>

@@ Line 44: / Line 44: @@
 ====Example 6====
 :How many moles of NaCl are in 1.234 L of a 0.521 M NaCl solution? (''...follow the units...'')
-::::<write it out>
+::::<write it out>...here is how i did it...
-:[[File:IMG_0293.jpg|400px]]
-<div align="right"> Answer: 0.5992 M NaCl</div>
+<div align="right"> [[File:IMG_0293.jpg|400px]]l</div>

@@ Line 2: / Line 2: @@
 ==Section 4.5: Concentration of Solutions==
 You may have noticed in lab that many of the solutions we used had a label like "3M" to indicate the concentration of the solute in the solution. 3M means 3 ''molar'' or the ''molarity'' is 3. As you will see in your text the definition of molarity (M) is the ''moles of solute'' divided by ''liters of solution''.
 :[[File:Molarity.jpg|300px]]
@@ Line 44: / Line 45: @@
 :How many moles of NaCl are in 1.234 L of a 0.521 M NaCl solution? (''...follow the units...'')
 ::::<write it out>

@@ Line 41: / Line 41: @@
 The above examples are considered fairly basic. In these problems above you were given either moles or grams of solute and the final volume of the solution and asked to calculate the molarity. There are 3 values, grams/moles (either one), volume of solution, and molarity; as with any math problem, if given any two fo the three, you can solve for the other.
-====Example 4====
+====Example 6====
 :How many moles of NaCl are in 1.234 L of a 0.521 M NaCl solution? (''...follow the units...'')