00:01
Hi, here we have to answer a few questions related to specific rotation.
00:04
Now, we are given with alpha observed, that is observed rotation which is equal to plus 3 degrees.
00:13
And now concentration is given as 0 .2 gram per ml and path length l is equal to 1 decimeter.
00:21
And now we have to calculate the specific rotation that is alpha, which is equal to plus 3 degrees divided by 0 .5.
00:30
2 multiply by 1.
00:33
So on calculating this we get the specific rotation as plus 15 degrees.
00:41
That is correct answer is option b.
00:46
Next part is here we have to calculate the first we need to calculate the specific rotation that is is equal to now observed rotation is 4 .8 degrees divided by concentration is 0 .1 .1.
01:04
1 gram per ml multiplied by 1 decimeter.
01:09
So on calculating we get plus 48 degrees the specific rotation.
01:14
Now we need to calculate the observed rotation at, that is if l is equal to 2 decimeter.
01:24
So now alpha observed will be equal to alpha, multiply by c, multiply by l, which is equal to plus 48 degrees, multiply by 0 .1 ,000, multiplied...