1.1. The Benedict's test for reducing sugars gives a semi-quantitative result when used on samples of reducing sugar solution.

Explain the term semi-quantitative in this context. 

1.2. A solution with an unknown concentration of glucose is tested for reducing sugar.

Outline a method for determining the concentration of glucose in this solution. 

1.3. Table 1 below gives the experimental protocol for making a serial dilution of a glucose solution.

The concentration of the stock solution of glucose that is to be used is 20 mmol dm^-3.

Table 1

Calculate the missing values and complete Table 1 with your calculated values.

1.4. In a similar procedure to that outlined in part (c), a student wished to make up a solution of glucose of 0.1 mmol dm ^-3 from a laboratory stock solution with a concentration of 100 mmol dm^-3.

The student evaluated two methods of producing this solution, methods A and B as shown below in Table 2.

Table 2

Select which method, A or B, would be the better method for the student to follow.

Give a reason for your choice.