science

Which of the following is a example of a irriversible change.
a)Disssolve salt in water
b)Freezing water
C)Mixing water-colour


Which do you think you can't separate? Can you separate salt after it is dissolved in water? I think I could evaporate the water and leave the salt behind.
Can water be melted after it is frozen?
Can water and a soluble dye be separated? Think of dyeing Easter eggs. Can you put the dry dye back into the box?

  1. 👍 0
  2. 👎 0
  3. 👁 156
asked by Rohit

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling

    asked by kayci on May 12, 2010
  2. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling

    asked by kayci on May 12, 2010
  3. chemistry

    the addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0 C to -3. 15 C. Determine how by how many degrees the freezing point dropped for every 10 g of salt added?

    asked by Ya Girl on January 29, 2013
  4. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling

    asked by kayci on May 12, 2010
  5. science

    which of the following is the best reason salt is sometimes spread on icy highways? 1) when a car drives on the ice, the firstion created between the salt and the ice produces heat that melts the ice. 2)when salt chemically reacts

    asked by kayci on May 12, 2010
  6. Chemistry - van't Hoff factor

    The freezing point of a salt and water mixture is -0.58 C. The freezing point of an unknown ionic solution (0.100 m) is -1.04 C. 1. Determine the freezing point depression for the ionic solution. 2. How do you determine the van't

    asked by Ally on September 13, 2017
  7. Chemistry

    Is the following a physical or chemical separations: salt water --> water+ sodium chloride Do you change the composition of the water? Do you change the composition of the salt. I can't say which because you don't tell me how you

    asked by George on September 9, 2006
  8. 7th Science

    the addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0 degrees Celsius to -3.15 degrees Celsius. determine how many degrees the freezing point dropped for every 10 g of salt added.

    asked by randomchik on September 26, 2012
  9. Chemistry

    How might one separate a mixture of water and salt? A solution of water and salt may be separated, if you don't want the water, by allowing the water to evaporate which will leave the salt crystals behind. If you want the water

    asked by Dave on September 9, 2006
  10. Chemistry

    Is dissolving salt in water an example of reversible? I don't think so because once salt is in water, the water is not clear anymore. Pls help. thanks. Yes, it is reversible. One ca physically separate the salt and water

    asked by Linda on February 14, 2007

More Similar Questions