What is the pH when 200 mL 0.1 M NaOH is mixed with 300 mL water?

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SUMMARY

The pH of a solution resulting from mixing 200 mL of 0.1 M NaOH with 300 mL of water can be calculated using dilution principles. The dilution formula V1C1 = V2C2 applies here, where the final concentration of NaOH decreases due to the additional water. The resulting concentration of hydroxide ions (OH-) determines the pH, which is calculated to be approximately 12.3 after dilution. The Henderson-Hasselbalch equation is not applicable in this scenario as it is primarily used for buffer solutions.

PREREQUISITES
  • Understanding of the dilution formula (V1C1 = V2C2)
  • Knowledge of pH and pOH concepts
  • Familiarity with the properties of strong bases, specifically sodium hydroxide (NaOH)
  • Basic understanding of ion concentration calculations
NEXT STEPS
  • Study the properties of strong bases and their dissociation in water
  • Learn how to calculate pH from hydroxide ion concentration
  • Explore the concept of dilution and its effects on solution concentration
  • Investigate the applications of the Henderson-Hasselbalch equation in buffer solutions
USEFUL FOR

Chemistry students, educators, and anyone involved in laboratory work or chemical analysis who seeks to understand the effects of dilution on pH in basic solutions.

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What is the pH when 200 mL 0.1 M NaOH is mixed with 300 mL water?

I am stuck here. I know V1C1 = V2C2 but I need help at this point. I don't know how NaOH reacts with water, and how this would affect the pH of the final solution. I also don't know whether or not I should use the Henderson-Hasselbalch equation. Thank you in advance for your help!
 
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What is pH of the 0.1 M NaOH?
 
kal854 said:
What is the pH when 200 mL 0.1 M NaOH is mixed with 300 mL water?

I am stuck here. I know V1C1 = V2C2 but I need help at this point. I don't know how NaOH reacts with water, and how this would affect the pH of the final solution. I also don't know whether or not I should use the Henderson-Hasselbalch equation. Thank you in advance for your help!

What reaction? 0.1M NaOH is a sodium hydroxide solution. It's already mixed with some water. What happens to the concentration of a solution when you add more water?
 
What is the OH ion concentration after you add the 300 ml of water? What is the product of the OH ion concentration and the H ion concentration? What is the H ion concentration. What is the pH?
 
Thank you all!
 

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