Find the concentration in mass per litre if 40g of caustic soda has been dissolved in 0.05dm3 of solution?

To find the concentration in mass per litre, we first need to convert the volume from dm^3 to litres:

0.05 dm^3 = 0.05 L

Next, we calculate the concentration in mass per litre by dividing the mass of caustic soda by the volume of the solution:

Concentration = 40g / 0.05L
Concentration = 800 g/L

Therefore, the concentration of the solution is 800g/L.

Concentration in mass per litre = (Mass of solute in grams)/(Volume of solution in litres)
= 40 g / (0.05 dm3 x 1 L/dm3)
= 40 g / 0.05 L
= 800 g/L