If a substance is solid at room temperature, has a crystalline structure, dissolves easily in water, and conducts electricity well, then it likely contains ionic bonds. Otherwise, it likely contains covalent bonds. Was the hypothesis, repeated above, completely supported? Justify your answers.

Corn starch, one of the covalent compounds, is solid at room temperature. The property of being solid is more common to ionic compounds. So, the hypothesis was mostly supported except for this one data point.

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Erudite1 Erudite1 · Answer 2 · 2018-08-24T13:41:45+02:00

If a substance is solid at room temperature, has a crystalline structure, dissolves easily in water and conduce electricity well, then such a substance contains AN IONIC BOND.

Ionic compound and covalent compounds are formed in different ways, ionic bonds are formed by donation of electrons while covalent bonds are formed by sharing of electrons, due to this fact, the compounds containing these two chemical bonds have different distinguishing properties.

All the properties given in the question above are characteristics of ionic compounds; the only exception is the state of matter of the substance. Just like ionic compounds, covalent compounds too can be solid at room temperature. But covalent compound can not conduct electricity and they do not have crystalline structure.