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How do you do an experiment to show how salt affects the freezing point of water?
Wiki User
∙ 12y ago
Salt Water takes longer to freeze than plain water I recently did an experiment for my 8th grade science class, on this subject. I took 1/4 of a cup of salt water, poured it into a cup of water and mixed it up. Measured a cup of water, and poured that into a cup. I put them both in the freezer after a half hour of sitting, so they could become room temperature. I then checked every 2 hours. They both hadn't changed much. After 4 hours, the salt water was all mushy, and so was the tap water. The tap water was more solid than the salt water though. After hours, they both were much more solid. The tap water was completely frozen at this time, but the salt wasn't there all the way.. yet. When I checked the salt water at 8 hours though, the salt water was completely frozen. The salt water has a constant drip on top though, I even left it in there for an extra day, I forgot to take it out - and the drip was still on top! To sum it up, the salt water takes 2 more hours than the tap water to freeze. If you have any questions or comments, message me @ meglovesyouxo@Yahoo.com Thanks!
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoof course!! this process iz called freezing method. u can also remove the salt from the water by boiling the water, usind the sun to evaporate the water, or use a fine filter to drain the salt.
Wiki User
∙ 12y ago.
You don't really need to do an experiment. Any precipitate dissolved in water (or another solvent) will depress the freezing point. Here's the equation:
ΔTF = KF · b · i, where delta T is the change in temperature, KF is the molal freezing point constant (you'll need to look that up in an appendix, it is different for every substance), b is the molality of the solution (moles of solute/ kg of solvent) and i is the number of ions in solution (NaCl, for example, forms two ions when it's dissolved in water, so the value of i is 2; this depends on the solute moelcule).
If you needed to do an experiment for the science fair or something you could just add varying amounts of a solute, salt would be easiest, and measure the freezing point of the new solution. Then you could see how your data matches up with the equation and measure your precision.
Wiki User
∙ 12y agoSalt Water room temperature (tap is fine) Bowl Freezer
Wiki User
∙ 11y agoYes you can because i did a science experiment for school and i got an a haha losers
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How does adding salt affect the freezing point of water and what is the procedure of this experiment?
Adding salt (sodium chloride) the freezing point of water decrease; for an experiment add gradually salt (in known quantities) and measure the freezing point after each addition.
Why is the thermometer not suitable to measure the freezing point and boiling point of water?
Although a thermometer CAN be used its presence affects the temperature.
Why does the freezing point affect the freezing of salt water?
It does not, but salt affects the freezing point. All solids are frozen. Each has a different freezing point. Ice is just the freezing point of water. But your computer keys are frozen too. Different substances freeze differently. But for your purposes, compare water to salt water. The salt in the water causes there to be more things in the water that disrupt the tight hydrogen bonds.Since freezing is tighter H-bonds, salt lowers the freezing temperature because it is harder to freeze it now since there is salt in it.
Is it true that water would never freeze at -4C?
No, pressure affects the freezing point of substances. When you increase the presure, you lower the freezing point. So if you kept water at -4C then increased the pressure enough, the water would start to freeze
What is 0 degrees Celsius?
It is the freezing point of water and equivalent to 32 degrees fahrenheit it is freezing! In Fahrenheit, it is 32 degrees. It is also the freezing point of water in Celsius.
How does adding salt affect the freezing point of water and what is the procedure of this experiment?
Adding salt (sodium chloride) the freezing point of water decrease; for an experiment add gradually salt (in known quantities) and measure the freezing point after each addition.
How antifreeze affects the freezing point of water?
It lowers the temperature where the mixture will freeze
Why is the thermometer not suitable to measure the freezing point and boiling point of water?
Although a thermometer CAN be used its presence affects the temperature.
What is the independent variable in this experiment does adding salt to water lower its freezing point?
salt. added by new author: As the amount of salt in the water iw increased the freezing point of water is decreased i.e. lowered. This is a negative correlation.
Does freezing temperature change at higher altitudes?
Elevation has minimal affects on the freezing point of water as it doesn't deal with gas molecules as boiling does. Elevation affects the boiling point of water because the air pressure changes with elevation.
Why does the freezing point affect the freezing of salt water?
It does not, but salt affects the freezing point. All solids are frozen. Each has a different freezing point. Ice is just the freezing point of water. But your computer keys are frozen too. Different substances freeze differently. But for your purposes, compare water to salt water. The salt in the water causes there to be more things in the water that disrupt the tight hydrogen bonds.Since freezing is tighter H-bonds, salt lowers the freezing temperature because it is harder to freeze it now since there is salt in it.
Is it true that water would never freeze at -4C?
No, pressure affects the freezing point of substances. When you increase the presure, you lower the freezing point. So if you kept water at -4C then increased the pressure enough, the water would start to freeze
What affects freezing point?
The factors that affect the freezing point of water are 1. pressure : the pressure on the liquid may alter the freezing point. 2. impurities : the impurities in water such as salt, sugar etc also alters the freezing point.
What does salt have to do with the freezing point of water?
Adding salt to water the freezing point decrease.
What is 0 degrees Celsius?
It is the freezing point of water and equivalent to 32 degrees fahrenheit it is freezing! In Fahrenheit, it is 32 degrees. It is also the freezing point of water in Celsius.
What kind of property is melting point and freezing point of water?
The melting point and freezing point of water are physical properties.
Does salt affect the temperature of water -boiling point - freezing point?
i would opt for the Freezing point. salt decreases the freezing point of water. so if water would normally freeze at 0C, saltwater would freeze at -3C.
