How is the concentration of an acid calculated? (F
Concentration = Moles/Volume
(Remember Tip: Moles/Voles)
How can the concentration of an unknown solution b
By using a titration.
How can the concentration of a solution be calcula
Step 1 : Mol KNOWN = C x V = Concentration X Volume (In dm^3, or divide cm^3 by 1000)
e.g. 0.1 x 24.7/1000 = 0.00247 mol
Step 2 : Deduce mol of unknown
e.g. Mol of HCl = 2 Mol NaOH
Step 3 : Calculate Conc. of unknown
Conc = Mol/Vol
e.g. 0.00247/0.025 = 0.0988 mol dm^-3
(The final calculation is from when Mr Penrose did a titration - where the unknown had a concentration of 0.1 mol dm^-3.) This shows that it isnt 100% accurate.)
There is a ratio of 20% water to 80% ethanol, whic
The solvent is ethanol, as there is more of it.
The water is a solute.
What does homogeneous mean?
It means equally dispersed.
If you heat water, what happens to its solubility?
It increases, until it starts boiling, where it doesn't have a solubility*.
*I think its right, but it could well be wrong.
What are negatives of hard water? Also, what cause
- No/Minimal Lather
- Formation of SCUM!
- Causes Washing Machines and Appliances to wear out faster
- It is caused by the presence of Mg2+ and Ca2+ (Both are Group 2 Elements)
What are advantages of hard water?
- It can benefit health
- Reduced risk of Heart Disease
- Calcium for stronger teeth