... was done by resin beads which reacted with the water by ion exchange, which removed the Ca and Mg ions. This concluded the lab and with all this information, we compared and made conclusions about our water samples. This experimental procedure was completed in order to find the hardness of samples of water. My group has chosen three different types of tap water from three ... different areas in order to show the comparison of the hardness of tap water. The samples were taken from East Halls (Hastings) in State College, a house in Pittsburgh, PA (2418 Rolling ... one reason it was taken...

• Word Count: 2264
• Approx Pages: 9
• Grade Level: High School

... water systems. The quality of the catchment determines the quality of the water harvested from it. Few communities have pristine water sources and the quality of water from most sources is at risk from activities occurring in the catchment. Importance of Water: More than 70 per cent of the Earth's surface is covered by water. The oceans and seas contain 97 per cent of all the water on the planet. Less ... than three per cent of the Earth's water resources can be described ... water and, with most rivers dammed or regulated, this issue is receiving increasing attention from governments, ...

• Word Count: 1501
• Approx Pages: 6
• Grade Level: High School

... of operating conditions provides the fastest rate of evaporation. The rate of drying will be determined by observing the amount of time it takes to reduce the mass of the desiccant from the saturated condition to the dry condition. The dry condition mass will be pre-determined by using a microwave to bone-dry the desiccant. The following heat balance can describe the rate of drying on the surface: dw/dt ... are being considered in this laboratory experiment are temperature and air flow velocity. The dependent variable will be the time it takes to dry the desiccant, from which a rate of ...

• Word Count: 1646
• Approx Pages: 7
• Grade Level: High School

... total use. Perth and Canberra, (bracketed figures are for Canberra. Sources: Stokes et al. 1995 (Perth); NCDC 1989 (Canberra). The pattern is similar for all Australian cities, with the major item in all cases being watering of the garden. Water saving strategies: Perth's Water Future (Stokes, et al., 1995) is a valuable addition to the literature on the reduction of urban water use because it converts domestic water ... use efficiencies listed are all attainable with present technology. Benefits to the consumers and the water companies vastly outweigh costs involved in the installation...

• Word Count: 2299
• Approx Pages: 9