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

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.