This is a lab called Enthalpy and Entropy of Borax Dissolution and I just can't seem to get the right answers... Please help me fill in the blanks
The _____ (acid/HCl?)is placed in the buret and the ____ (base/borax?) is placed in the flask beneath
the buret.
For this experiment bromocresol green is a(n) indicator and added to the _____ (borax/basic?) solution before titration.
The color of bromocresol green indicator is yellow when pH < 4, green when pH 4- 5.3 and blue in pH > 5.3.
The titrant volume when the bromocresol green changes color is called the _____.
Thanks!
Is this your question:
The ____ is placed in the buret and the _____ is placed in the flask beneath the buret. For this experiment bromocresol green is a(n) ______ and added to the________ solution before titration. The color of bromocresol green indicator is______ when pH < 4, green when pH 4- 5.3 and ______ in pH > 5.3.
The titrant volume when the bromocresol green changes color is called the______ .
ANSWERS: titrant, analyte, indicator, analyte, yellow, blue, end point.
I know I'm to help fill in the blanks but I'm a little confused. The last blank should be "end point." I think HCl is the first one, borax the second. Is this what you need?
Sorry, if I wasn't very clear. I've tried both acid and HCl for the 1st blank and borax and base for the 2nd blank, but still wrong. end point is right though!
Try it the other way around. You may have the acid in the beaker and the borax in the buret.l
To fill in the blanks, here's an explanation of how you can determine the correct answers:
1. The acid is placed in the buret and the base is placed in the flask beneath the buret.
- In a titration experiment, the acid is generally used as the titrant (the solution in the buret) since it is added dropwise to the base (the solution in the flask).
2. For this experiment, bromocresol green is an indicator and added to the basic solution before titration.
- In this specific experiment, borax is acting as a base, so it should be referred to as the "base" in the context of this question. The basic solution is prepared by dissolving borax in water, to which bromocresol green is added as an indicator.
3. The color of bromocresol green indicator is yellow when pH < 4, green when pH 4-5.3, and blue when pH > 5.3.
- Bromocresol green is a pH indicator that changes color depending on the acidity or basicity of the solution. When the pH is below 4, it appears yellow. In the pH range of 4-5.3, it turns green. And when the pH is above 5.3, it appears blue.
4. The titrant volume when the bromocresol green changes color is called the "endpoint".
- In a titration, the endpoint is the point at which the indicator undergoes a color change, indicating that the reaction between the titrant (acid) and the analyte (base) is complete. In this case, the solution reaches the endpoint when the bromocresol green indicator changes color, which can be observed and recorded as the titrant volume.
Make sure to double-check these explanations with your lab manual or instructor, as they may provide specific instructions or definitions for these terms in the context of your lab.