pH of Household Ammonia (NH3) and Color Changing pH Paper

Wayne Breslyn
Wayne Breslyn
6.5 هزار بار بازدید - 3 سال پیش - Ammonia is often used as
Ammonia is often used as a household cleaner (diluted to between 2 to 10% by weight).  It is found in many cleaners such as window cleaners, polishes, drain cleaners, and more.  

To determine the pH level of household ammonia (NH3 in water) we can use a pH paper as well as a pH meter.  pH paper will turn blue when dipped in ammonia indicating that it is a base.  A pH meter can provide a more accurate reading.  

In this video the pH was found to be around 10 or 11 using pH paper.  The pH meter found it to be 10.60.  Compared to reported pH values for ammonia (between 11 and 12) this is a bit lower.  The bottle used for this video was fairly old which may have influenced the pH.  It may also be that the particular brand used has a lower percentage of ammonia and therefore the pH is lower.

Because the pH is above 7 we consider NH3 to be a base and the solution is considered alkaline.

📽 Useful Videos 📽
• Is NH3 (Ammonia) an Acid, Base, or Neutral?: Is NH3 (Ammonia) an Acid, Base, or Ne...
• Equation for NH3 + H2O (Ammonia + Water):  Equation for NH3 + H2O     (Ammonia +...
• Hydrogen Bonding in Ammonia (NH3):  Hydrogen Bonding in Ammonia (NH3)
• Type of Bonds for NH3 (Ammonia): Type of Bonds for NH3 (Ammonia)
• NH3 Lewis Structure: NH3 Lewis Structure - How to Draw the...

📖 Chapters 📖
0:00 Intro
0:16 Ammonia and Hydrochloric acid  
0:44 pH Paper and pH Meter in Ammonia Solution
1:10 HCl and NH3 on pH Paper (cool colors!)

More chemistry at https://www.Breslyn.org
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