The acidity of any substance can be tested by a PH paper.
There are also many chemical methods but these methods only tell you whether the substance is acidic, basic or neutral in nature.
Use Color code system along with PH paper,you can compare the colors and determine the exact acidity.
Note: Acid turns blue litmus paper to red. This is one of the tests for acidity.
We have different blocks because of the different groups. One way to group elements is by element blocks, sometimes known as element families. Element blocks are distinct from periods and groups because they were developed based on a very different way of categorizing atoms.
Explanation:
pH is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions are measured to have lower pH values than basic or alkaline solutions. The pH scale is logarithmic and inversely indicates the concentration of hydrogen ions in the solution.
Answer:
0.74°C
Explanation:
The freezing point depression is a colligative property that can be calculated using the following expression.
ΔTf = Kf . b
where,
ΔTf: depression in the melting point
Kf: freezing point depression constant
b: molality
The mass of the solvent (benzene) is:
The moles of solute (naphtalene) are:
The molality of naphtalene is:
ΔTf = Kf . b
ΔTf = (4.90°C/m) . 0.972m = 4.76°C
The melting point of the solution is:
5.50°C - 4.76°C = 0.74°C
Well the first thing you need to know is how much energy that 1g methanol release which is fixed value
Methanol CHOH is 17000 j/g
so the energy released when 10.0g of methanol is burned
=10x 17000
=170000 j
