Copper (I) oxide: Cu2O
The Fehling's solution turns red when it comes into contact with reducing sugars such as glucose. This color change occurs because the reducing sugars react with the copper ions in the Fehling's solution to form a red precipitate of copper(I) oxide. This is a characteristic test used to detect the presence of reducing sugars in a solution.
When red blood cells are kept in a 10% glucose solution, water will flow out of the cells due to osmosis, causing them to shrink and become crenated. This is because the solution is hypertonic compared to the inside of the red blood cells.
When a glucose indicator, such as Benedict's solution or Fehling's solution, is added to a solution containing glucose and heated, it undergoes a chemical reaction with the reducing sugar glucose. This reaction results in a color change from blue (in the case of Benedict's solution) or deep blue (in the case of Fehling's solution) to a brick-red or orange precipitate. This color change indicates the presence of glucose in the solution.
You can prove there is glucose in a sample by using Benedict's Solution. Heat up the sample, and add the Benedict's Solution. Assuming the solution is clear, if glucose is present it will change colour to red, or yellow, or green. If not, it will stay clear.
Copper (I) oxide: Cu2O
2% glucose solution is considered as a hypotonic solution for that the solution will enter the semi-permeable membrane of the red blood cells causing the cells to explode or burst. Why? It's because RBCs have a higher concentration inside it than that of the 2% glucose solution so the solution will enter the cells.
Depending on the amount of glucose (sugar) that is present, the solution will turn a certain color. The progression goes as follows: blue (no glucose present), green, yellow, orange, red, and then brick red or brown for a very high glucose content.
orange
Benedict's solution turns brick red when mixed with simple sugars like glucose, fructose, or maltose. This color change indicates the presence of reducing sugars in the solution due to the reduction of copper ions in the Benedict's solution.
because glucose isn't acidic
Acids turn universal indicator solution red.
The Fehling's solution turns red when it comes into contact with reducing sugars such as glucose. This color change occurs because the reducing sugars react with the copper ions in the Fehling's solution to form a red precipitate of copper(I) oxide. This is a characteristic test used to detect the presence of reducing sugars in a solution.
Benedict's test is a simple chemical test used to detect the presence of reducing sugars like glucose in a solution. The test result is positive if a brick-red precipitate forms, indicating the presence of reducing sugars. If the solution remains blue, it indicates a negative result.
One way is by polarimeter; glucose and sucrose rotate polarized light in opposite directions. This is assuming your materials are of biological origin and therefore consist of the D-forms of both; if they're synthetic, then all bets are off.
because it contains glucose
Red litmus paper would turn blue in a phosphate solution, indicating that the solution is basic.