18 Jun HOW DOES PLAQUE HARM TEETH?
Pre-lab Questions
Name the chemical that makes up teeth.
How does plaque harm teeth?
How does fluoride promote dental health?
Write two solubility rules that are used in this lab.
Experiment: Battle of the Mouth Rinses
Some mouth rinses contain fluoride, usually in the form of sodium fluoride, which is soluble in water. In this lab, you will determine which one of two mouth rinses would be better at preventing cavities by replacing lost minerals with fluoride. You will do this by determining which rinse contains fluoride.
Procedure
**Take photographs of your experiment set up and your results. Submit them with your laboratory report.**
Label the two test tubes with a permanent marker as A and B.
HINT: Make sure to write down which rinse is A and which is B.
Pour 10 mL of Rinse A into the test tube marked A.
Pour 10 mL of Rinse B into the test tube marked B.
HINT: If using the same graduated cylinder to measure your rinses, wash the cylinders WELL between pours to prevent cross-contamination.
Pour 3 mL of 1 M Ca(C2H3O2)2 solution into each of the test tubes. Gently stir each test tube with a stir rod to mix. Be sure to clean your stir rod each time before placing it in a solution.
CAUTION: Mixing should be done gently to prevent glass breakage and injury.
Observe and record initial observations immediately after adding calcium acetate to the test tubes.
Observe the reactions for at least 10 minutes to ensure it is finished. HINT: A positive test is indicated by a cloudy appearance of the solution. The precipitate formed can be more easily seen if the test tube is held up to the light. The precipitate will eventually settle to the bottom of the test tube.
Let the test tubes sit for an hour. After an hour, record final observations.
Record all observations in the Data section.
To clean up, you can rinse the small amount of precipitate down the drain.
Data
Observations of NaF and Ca(C2H3O2)2 (see sequence of pictures below)
Observations of Rinse A and Ca(C2H3O2)2
Observations of Rinse B and Ca(C2H3O2)2
Post-lab Questions
Take photographs of your experiment set up and your results. Submit them with your laboratory report.
Did either of the mouth rinses contain fluoride? How did you know?
Which mouth rinse would be better at fighting cavities? Why?
ORDER THIS PAPER NOW AND GET AN AMAZING DISCO
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.