Jul 07 , 2014

Understanding Water Conductivity for Kids

When we think of electricity, we usually imagine wires in our houses or the huge electrical cable lines outdoors. But did you know that water can also be used to conduct electricity? In fact, it’s a very powerful conductor! The temperature of the water plays a large role in how well it conducts electricity. Hot water conducts better in general. One reason that we might want to estimate the conductivity of some water is to find the amount of solids that are dissolved in it, such as salt. When you stir salt into warm water, it dissolves. A chemical reaction takes place, so the solid salt grains turn into positive and negative ions. These ions help to carry electricity in the water. Keep in mind that adding salt to water will only work until a point, and after that adding more salt will not have much effect any more.