A student thinks she might have accidentally mixed up her sugar and her salt and put them in the wrong containers. The crystals look similar and have no smell. Which test can the student run to determine which one is sugar and which one is salt? indicator test
benedict's test .Benedict’s test/ my answer
vinegar test
iodine test
Sucrose is a non-reducing sugar; therefore, it will not work with Benedict's reagent. None of the tests listed is good to distinguish between the two and there are others that work much better. However, of those listed IF YOU WILL DISSOLVE SOME OF EACH IN WATER, HEAT THE WATER FOR A FEW MINUTES, THE SUCROSE WILL BREAK DOWN INTO FRUCTOSE AND GLUCOSE BOTH OF THOSE ARE REDUCING SUGARS AND WILL GIVE A POSITIVE TEST WITH BENEDICT'S SOLUTION.
So whats the answer?
To determine which one is sugar and which one is salt, the student can perform a simple test called the Benedict's test. Here's how the test works:
1. Prepare a small amount of a solution of Benedict's reagent. This can be done by mixing together equal parts of Benedict's solution and water.
2. Take a small sample of one of the crystals and dissolve it in a small amount of water in a test tube or a small cup. Make sure the crystal is fully dissolved.
3. Add a small amount of the Benedict's reagent solution to the test tube with the dissolved crystal.
4. Gently heat the test tube by placing it in a hot water bath or holding it over a flame. Be careful not to overheat the solution.
5. Observe the color change in the solution. If the solution turns yellow or orange, it indicates the presence of sugar. If no color change occurs, it suggests the crystal is not sugar.
Repeat the same process with a different crystal suspected to be the other substance. If it undergoes a different color change or no color change compared to the first crystal, it would indicate the presence of salt.
It is important to note that this method is only applicable if the crystals are pure sugar and salt. If other substances or impurities are present, it may affect the test results.