Sodium carbonate (naco3) is sometimes used as a water-softening agent. suppose that a worker prepares a 0.730 m solution of naco3 and water. the volume of the solution is 1.421 liters. what is the mass of solute in the solution?

express your answer to three significant figures.

the mass of dissolved sodium carbonate is

grams

The answer to your question is: 110 g of Na₂CO₃

Explanation:

Data

Na₂CO₃  

concentration = 0.73 M

volume = 1.421 l

MW Na₂CO₃ = (2 x 23) + (12 x 1) + (16 x 3) = 106 g

Process

Molarity = moles / volume

moles = Molarity x volume

moles = 0.73 x 1.421

moles = 1.03733

                                1 mol of Na₂CO₃  106 g

                                 1.03733               x

                                  x = (1.03733 x 106) / 1

                                  x = 109.95 g ≈ 110 g

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.