Which is more likely to freeze mineral water or juice?

Experimental equipment: 2 glass rods with equal parts of water and juice.

Procedure: Insert 2 glass sticks into the juice and water respectively and put them in the refrigerator at the same time.

Phenomenon: After 20 minutes, it will be found that the juice has frozen.

The experiment should record which froze first and the time it took to freeze.

Reason: It is possible that the water does not freeze below 0 degrees Celsius, forming supercooled water, because there is no condensation nucleus in the water. There are many impurities in the juice, which becomes a crystalline nucleus and is more likely to freeze, while the water is relatively pure, but it is not easy to freeze. Reference.

Considerations: The amount of liquid, the shape of the cup, and the outside temperature should be uniform, so that the difference in the type of liquid is the only difference.

Experimental equipment: 2 chopsticks, equal amount of mineral water and fruit juice.

Procedure: Put the mineral water and juice in a glass cup of the same shape, put 2 chopsticks in the juice and mineral water respectively, and put them in the refrigerator at the same time.

Experimental phenomenon: Observe every 5 minutes, and it will be found that when the chopsticks in the juice cannot be pulled out and it has frozen, the mineral water has not frozen.

Phenomena that should be recorded: the liquid that freezes first, the time it takes for each to freeze.

If you want to analyze the reason, it is because mineral water is a dilute solution, and its freezing point is lower than that of pure solvent water, while fruit juice is a turbid liquid with many small impurities, forming a condensation nucleus, making its freezing point higher than water.

This is a physical phenomenon called supercooling.

Because mineral water contains many inorganic minerals, the freezing point of pure water is zero degrees Celsius under standard conditions, but it cannot be below zero degrees due to minerals. When this is the phenomenon of supercooled water. Since the mineral water is relatively pure, it will not freeze immediately even if it is slightly below zero in the case of **.

When you take it out, the steady state of the water changes, so it freezes quickly. When opened, the water is extremely exothermic due to the temperature difference, and the temperature drops dramatically, causing it to freeze.

1. If the fruit is pure juice, it will definitely freeze slower than water.

2. As Cong Hui hail fruit you said, the juice is not squeezed by Bido, but a commercially available fruit juice drink, which will contain sugars, citric acid, low-grade acids and low-grade esters, after they are mixed with water, they will definitely reduce the melting point, and the main component of car antifreeze is a mixture of water and two-carbon alcohols.

3. On the contrary, if the freezing point of the aqueous solution is raised, there are relatively few substances.