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High School Physics Chemistry Program Secondary Level: Matter / Aqueous solutions, an example of a mixture Solvent, solute. Mass concentration, maximum concentration of a solute. Dosage by calibration. 00:00: What is an aqueous solution? 01:14: What is mass concentration? 02:53: Mass concentration Vs Density 04:43: How to dissolve? 06:59: How to dilute? 11:34: How to determine an unknown concentration?