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Questions and Answers
What is the formula for calculating molarity?
What is the formula for calculating molarity?
- Molarity = No. of moles of solute + No. of liters of solution
- Molarity = No. of liters of solution / No. of moles of solute
- Molarity = No. of liters of solution - No. of moles of solute
- Molarity = No. of moles of solute / No. of liters of solution (correct)
When the molarity is expressed as 0.5 M NaOH, what does this indicate about the solution?
When the molarity is expressed as 0.5 M NaOH, what does this indicate about the solution?
- There are 0.5 moles of NaOH in 1 liter of solution (correct)
- There are 1 mole of NaOH in 2 liters of solution
- There are 0.5 liters of NaOH in 1 mole of solution
- There are 0.5 moles of NaOH in 0.5 liters of solution
Which unit is commonly used to express molarity?
Which unit is commonly used to express molarity?
- mass/L
- mol/100mL
- mol/L (correct)
- volume/moles
To calculate the molarity of a solution, which two pieces of information are necessary?
To calculate the molarity of a solution, which two pieces of information are necessary?
If you have a solution with a molarity of 1 M, how many moles of solute would you have in 2 liters of solution?
If you have a solution with a molarity of 1 M, how many moles of solute would you have in 2 liters of solution?
What is the full name of the first individual mentioned in the content?
What is the full name of the first individual mentioned in the content?
Which domain of expertise might Dr. Galal Magdy represent based on the context provided?
Which domain of expertise might Dr. Galal Magdy represent based on the context provided?
What is the common format used for the email address in the content?
What is the common format used for the email address in the content?
What resource may you expect from the individuals mentioned in the content?
What resource may you expect from the individuals mentioned in the content?
What is a likely setting for the individuals mentioned in the content?
What is a likely setting for the individuals mentioned in the content?
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Study Notes
Molarity
- The most commonly used unit in chemistry.
- Molarity = Number of moles of solute / Number of liters of solution
- Unit: (mol/L) or (mol.L-1) or M
- Example: 0.5 M NaOH means 0.5 mole NaOH / 1L solution
Molarity Calculations
- To calculate molarity, we need to know the number of moles of solute and the number of liters of solution
- Adding water makes the solution less concentrated
- This inverse relationship can be expressed with the following equation: Mi × Vi = Mf × Vf
- Increasing the final volume (Vf) decreases the final molarity (Mf)
Electrolyte and Nonelectrolyte Solutions
- This topic appears to be missing from the provided text
Learning Outcomes
- This lecture covers topics including:
- What is Chemistry?
- Solution Terminology
- Solubility
- Mole concept
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