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xeze [42]
3 years ago
10

during her science fair project, mary discovered that solutions of ionic compounds in water conduct electricity. What type of in

vestigation could mary perform to discover which type of ions conduct electricity best?
Chemistry
1 answer:
Brums [2.3K]3 years ago
8 0

Mary could do two types of experiments

<em>Type 1</em>. She could <em>hold the cation constant and vary the anion</em>.

She could try solutions of NaCl, NaBr, NaI, Na₂SO₄, Na₃PO₄, etc.

These experiments would tell her which <em>anions</em> are the best conductors.

<em>Type </em>2. She could <em>hold the anion constant and vary the cation</em>.

She could try solutions of NaNO₃, KNO₃, Mg(NO₃)₂, Ca(NO₃)₂, Al(NO₃)₃, etc.

These experiments would tell her which <em>cations</em> are the best conductors.

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First, we apply the law of conservation of mass which states that the total mass in a system remains constant.
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The heat of the reaction, in kJ, when 4.18 g of the hydrocarbon are combusted 775.70 kJ.

The heat energy is given as :

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