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Assume that there is a puddle that contains 12.0 kg of water and it froze outside since it is -1°C. The
custodian threw 6.00kg of salt (NaCl) onto the puddle and we assume that all the water melted and the
sodium chloride completely dissolved into the water. What temperature would it need to be to re-freeze
that solution?

Respuesta :

michell96

The temperature that must be to freeze the solution would be -21.1 ° C.

How to calculate the freezing temperature of this solution?

To calculate the freezing temperature we must take into account the following information.

  • Solution with a salt concentration of 10% is frozen at -6°C
  • Solution with a salt concentration of 20% is frozen at -16°C
  • Solution with a higher concentration is frozen at -21.1°C

According to the above, it can be inferred that the puddle has a 50% concentration of salt because they had 12 kg of water and 6 kg of salt.

So the lowest freezing temperature would be 21.1°C because the puddle is 50% concentrated.

Note: This question is incomplete because there is some missing information. Here is the missing information:

  • A 10% salt solution freezes at about 20°F (-6°C), and a 20% solution freezes at 2°F (-16°C).
  • The lowest freezing point obtainable for salt solutions is −21.1 °C

Learn more about freezing in: https://brainly.com/question/14131507

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