Answer:
Hi there!
Your answer is:
B. Water shrinks when it freezes
Explanation:
When things are frozen, most commonly they shrink. This is due to the coldness calming down the atoms. When the atoms don't move as much, they get compressed together!
I hope this helps!
Answer:
true
Explanation:
since they tend to loose electrons to in their outer most energy level to acquire a stable electron configuration.
F atomic number 9, mass 19
Ne atomic number 10, mass 20
Na atomic number 11, mass 23
Mg atomic number 12, mass 24
Answer:
Definition:
Titration is a quantitative technique where solution of known concentration is used to determine the concentration of unkown solution.
Explanation:
Titration is a quantitative technique where solution of known concentration is used to determine the concentration of unkown solution. it is also called titrimetry or volumetric analysis.
Titrant:
The known solution is called titrant. Titrant is prepared from the standard solution of known concentration and volume. It is added from the burette to the analyte.
Analyte:
The substance whose concentration or quantity is to be determine is called analyte. Titrant is carefully added to the analyte to carry out the reaction untill the end point is reached.
Usually the indicator are used to signal the end point.
End point:
It is also called equivalence point. it is the point where indicator shows that the amount of titrant needed to complete the reaction is added to the solution. it is indicated by colour changes during the reaction.
Procedure:
1. The burette is filled with titrant.
2. The flask is filled with the analyte.
3. One drop of indicator is added to the analyte before satrting the titration.
4. Now the titrant is added slowly into the analyte, drop wise until the indicator show the colour which indicate the end point.
5. After the end point is reached, note the burette reading.
6. At the end of titration final calculations can be done.
Types of titration:
Acid-Base titration
Redox titration
