Editing Lab Quiz On PH Reading Lab

ChemistryWiki | RecentChanges | Preferences

Answer the following questions. 
 
1. Write the pH you got for the following solutions in the lab, DI water: pH = ___________ , 1.0M <nowiki>NaOH</nowiki> solution, pH = _________ . Circle the one that has a higher [H+] (hydronium ion Molarity/concentration) 
 
2. Write the pH you got for the following solutions in this lab, 1.0M <nowiki>HCl</nowiki>. pH = ______ and 1.0M HC2H3O2 (called acetic acid), pH = ___________ 
In the space below explain why they do not have the same pH even though they have the same Molarity (both 1.0M solutions). 
 
 
 
 
 
3. Write the pH you got for the Tap water, pH = ____________. As you know, a container full of "just water molecules" actually have [H+] and [OH1-] of 1.0E-7M thereby indicating that these ions exist with the water molecules (from the ionization of water). This is why people say pH of "just water" is 7.0. Since your pH reading is not 7.0, what does that tell you about what is in your water besides "just water molecules". Explain. 
 
 
 
 
 
 
4. Write the pH you got for the 1.0M H2SO4 solution. pH = ________. In the space below, show all the calculations to determine the [H+] of this solution. 
 
 
 
 
 
 
5. Please provide in the blanks below, the observations you obtained from one of the solutions in the lab. 
 
Station number: ________&nbsp;&nbsp;&nbsp; Description: ____________________________ 
 
Color of Red litmus paper: ______________&nbsp;&nbsp;&nbsp;Color of Blue litmus paper: ______________ 
 
Color of pH paper: _______________&nbsp;&nbsp;&nbsp;pH Reading (to 1 decimal place) : __________ 
 
On the back of this page, show all calculations to determine the pOH, [H+], and [OH1-]. Circle each answers. Please remember to use units, sig fig and chemical formulas/symbols where appropriate.

View other revisions
ChemistryWiki | RecentChanges | Preferences