Friday, 16 October 2015

The solubility of potassium chloride at 20 degree celsius is 34.7g in 100g of water

The solubility of potassium chloride at 20 degree celsius is 34.7g in 100g of water.The density of the solution is 1.3g/ml.What is the w/v percentage of potassium chloride in the solution
Answer
Step-1: Let volume of the solution be V ml which contains 34.7gm of KCL and 100gm of water ?
Step-2: Density= (34.7+100)/V = 1.3gm/ml
Step-3:134.7=1.3V
Step-4:V=134.7/1.3 ml=103.61ml
Step-5:%w/v=mass of KCl in 100 ml of solution
Step-6:103.61 ml of KCL contains 34.7 g of KCl 
Step-7:100ml of KCL contains=34.7/103.61x100=33.49gm/100 ml 


Tuesday, 11 August 2015

Who is happy??



A Crow was absolutely satisfied in life.

But one day he saw a swan...
This swan is so white and I am so black...crow thought.

This swan must be the happiest bird in the world.

He expressed his thoughts to the swan.
"Actually," the swan replied,

"I was feeling that I was the happiest bird around until I saw a parrot, which has two colors.
I now think the parrot is the happiest bird in creation."

The crow then approached the parrot.
The parrot explained,
"I lived a very happy life—until I saw a peacock.
I have only two colors, but the peacock has multiple colors."

The crow then visited a peacock in the zoo and saw that hundreds of people had gathered to see him.

After the people had left,
The crow approached the Peacock..

Dear Peacock,
You are so beautiful.
Every day thousands of people come to see you.
When people see me,
they immediately shoo me away.
I think you are the happiest bird on the planet.

The peacock replied,
I always thought that I was the most beautiful and happy bird on the planet.
But because of my beauty,
I am entrapped in this zoo.

I have examined the zoo very carefully, and I have realized that the crow is the only bird not kept in a cage.

So for past few days I have been thinking that if I were a crow,
I could happily roam everywhere.

That's our problem too.

We make unnecessary comparison with others and become sad.

We don't value what God has given us.
This all leads to the vicious cycle of unhappiness.

Value the things God has given us.

Learn the secret of being happy and discard the comparison which leads only to unhappiness..