Ira is working in a lab with a unknown solution. When he inserts the electrical conductivity tester in the unknown, the bulb begins to glow brightly. Which of these would BEST describe the unknown liquid?

It contains an ionic compound that conducts electricity in solution

Explanation:

The unknown liquid Ira is working with in the lab contains an ionic compound that conducts electricity when in liquid form or dissolved in water.

Ionic compounds are good conductors of electricity when in liquid form or disolved in water and good insulators when solid. They also have a high melting point. Ionic compounds are more soluble than each other and some ionic compounds are insoluble, that is, they don't dissolve in water.

Ionic compound in the liquid form or dissolved in water conduct electricity because their ions are free to move from one place to another unlike ionic compound in the solid form whose ions are fixed.

The liquid contains an ionic compound that conducts electricity in solution.

Explanation:

When the bulb glows brightly, it means that the solution is a conductor of electricity. We know this because it allows electrical current flows through it when the plug is submerged in it (I.e. the unknown solution)

This also mean that the solution has high conductivity.

In summary, the bright glow of the bulb resulting from the experiment shows that the current flows easily through the unknown liquid.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g