Short Answer 
The concentration of a solution is the mass of solute relative to the total mass of the solution, expressed as a percentage. To prepare a 10% glucose solution, mix 10g of glucose with 90g of water, resulting in a total mass of 100g, which confirms the desired concentration of 10%.
Step 1: Understanding Solution Concentration
The concentration of a solution is defined as the ratio of the mass of the solute to the total mass of the solution, multiplied by 100%. This is often expressed as mass percent, a common way to represent concentration. To calculate concentration, the formula is:
- (Mass of Solute / Mass of Solution) * 100%
Step 2: Preparing a 10% Glucose Solution
To create a 10% solution of glucose in water, you start with specific masses of glucose and water. For this solution:
- Glucose (solute): 10g
- Water (solvent): 90g
- Total mass of solution: 100g
This mixture will yield a solution where the mass of glucose constitutes 10% of the total mass of the solution.
Step 3: Confirming the Mass Percent
The mass percent allows you to verify the concentration of your solution. In this case, with 10g of glucose in a total of 100g of solution, the concentration is calculated as follows:
- (10g glucose / 100g solution) * 100% = 10%
This confirms that you have successfully prepared a 10% solution of glucose by mass in water. Understanding this principle is critical for correctly preparing solutions in various applications.