RENDEMEN IS EASY

Calculating Rendemen Value

if we want to talk about rendemen, what is rendemen? how we calculate rendemen? how we determine the velue of rendemen?. for answer this questions, read carefully my blog and get easy.

Rendement is the ratio of the amount (quantity) of an produced from the extraction of something, for example the amout of oil produced from the extraction of aromatic plants. Rendemen use percent unit (%). The higher rendement value indicates that the value of the oil produced is too much.
Increasing rendement or the ratio of the amount of oil produced can be done with two approaches,

First, the process of cultivation.
Second, the process of making oil
The quality of the oil produced is usually inversely proportional to the number of rendaments produced. The higher of rendamen so lower the quality obtained. The formula for calculating the following rendamen: 

 

In chemistry, the chemical rendemen, the rendemen of the reaction, or only the rendement refers to the amount of reaction product produced in the chemical reaction. [1] Absolute rendement can be written as weight in grams or in moles (molar yield). The relative rendemen used as a calculation of the effectiveness of the procedure is calculated by dividing the amount of product obtained in moles by the theoretical rendemen in moles:

 

To obtain a rendemet percentage , multiply the fractional of rendement by 100%.

One or more reactants in chemical reactions are often used is too much. The theoretical rendement is calculated based on the number of moles of the limiting reagent. For this calculation, it is usually assumed that there is only one reaction involved.

The ideal chemical rendemet value (theoretical rendement) is 100%, a value highly unlikely to be achieved in its practice. Calculate the percentage of rendement that is by using the following equations percent rendemen = weight yield / weight of yield divided by the sample weight multiplied by 100%

for SAMPLE CASE
• IF WE KNOWN SAMPLE OF SALT AND SAND HAVE MIXED, TO SEPARATE SALT IS WITH  ISOLATION OF SALT FROM THE SOLUTION.
• 20 MIXED GRAMES BALANCED, REQUIRED IN AQUADEST 100 ML. AFTER SEVERAL AFTER SALT DISOLVED, THEN STRAINED THE SOLUTION TO SEPARATE SAND AND  SALT..
• SALINE SOLUTION HEATED UNTIL ALL OF THE WATER EVAPORATED AND LEFT BEHIND SALT POWDER
• WE CAN KNOW THE SALT RENDEMEN IN SANDS AS FOLLOWS:

SAMPLE CASE
                                 WEIGHT ZAT X
• RENDEMEN = -------------------------------- X 100%
                                  MIXED WEIGHT

                                8.0 GRAM
  • RENDEMEN = ------------------------ X 100%
                                      20.0

 
GRAM RENDEMEN = 40%

 

 for example :

1. If the reaction between 6.0 grams of ethane, C2H6 (Mr = 30) with 7.1 grams of Cl2 (Mr = 71) produce 5.16 grams of C2H5Cl (Mr. 64.5), then the percentage of ethyl chloride rendement is ...

 Discussion:

C2H6 + Cl2 → C2H5Cl + HCl

C2H6 = 6/30 = 0.2 mol

Cl2 = 7.1 / 71 = 0.1mol (discharged)

C2H5Cl (theoretical) = 1/1 x 0.1 mol = 0.1 mol

           = 0.1 x 64.5 g = 6.45 g

% Rendemen = 5.16 / 6.45 x 100% = 80%.