What is the answer in the blank for light liquid and heavy liquid concerning specific gravity and percent error?

Question

The format goes in this:

Light liquid- Mineral Oil and Heavy liquid – NaCl soln 20%)

250 mL graduated cylinder with the liquid to be tested up to the 200 ml mark.

Hydrometer Method

Result: (for light liquids)

Sp gr of Mineral oil (Experimental) =0.78

Sp gr of Mineral oil ( Theoretical)= ______

% Error -Mineral oil =______%

(for heavy liquids)

Sp gr of NaCl 20% soln. (Experimentl) =1.18

Sp gr of NaCl 20% soln. (Theoretical) =______

% Error - NaCl 20% soln. =______%

Answer 1

Hello, Jenson,

Are the theorectical values for the specific gravity provided in your book or handout? Use those instead of the ones I found at: https://www.engineeringtoolbox.com/specific-gravity-liquid-fluids-d_294.html

Result: (for light liquids)

Sp gr of Mineral oil (Experimental) =0.78

Sp gr of Mineral oil ( Theoretical)= _0.92____

% Error -Mineral oil =__-15.2____%

(for heavy liquids)

Sp gr of NaCl 20% soln. (Experimentl) =1.18

Sp gr of NaCl 20% soln. (Theoretical) =_1.19___

% Error - NaCl 20% soln. =__-0.84____%

Experimental Error = [(Actual - Theor.)/(Actual)]*100%