Chemistry Homework 6/18/13

ISAS

3. 

1. Manufacture of the filter paper-Indirect water use. When manufacturing filter paper there are many elements that contribute to the manufacturing that all use water like materials for the paper, the running of the machinery, and transporting the filter paper. The amount of water is not clearly measured; therefore, it is hidden and is an indirect water use. 
2. Premoistening of the sand and gravel- Direct water use. When you moisten sand and gravel you need to measure the exact amount of water used, so it is clearly a direct water use. 
3. Use of water to cool the distillation apparatus- direct water use. Like the premoistening of the sand and gravel, you measure the amount of water needed. Thus, to cool the distillation apparatus you also measure the water which proves it is a direct water use. 

1. To “purify” water means to create a clean product, or filtrate. To do this, you need to get rid of unwanted materials such as dirt. You can purify water through oil-water separation, sand filtration, charcoal adsorption and filtration, and distillation. 
2. Three techniques for purifying water are oil-water separation, sand filtration, and charcoal adsorption and filtration.
3. In the oil-water step, oil was removed from my sample. In the sand filtration step, coffee grounds were removed from my sample. Finally, in the charcoal adsorption and filtration, the color, odor, and sand were removed from my sample.

1. In the foul water, the solid particles were heterogeneous: not uniform or evenly distributed. Salt water, however, is homogeneous because the small particles of salt are uniform throughout. Therefore, since the salt water is homogeneous and not heterogeneous, the same procedure will not work.
2. In order for the seawater to be suitable for drinking, the water would need to go through an additional purification step called distillation which would separate the salt from the water. 

A.8 pg. 22

1. Watering indoor plants, washing the floors, washing cars. 
2. I could not do without showering. 
3. I could reduce my water use for showering because I usually take very long showers. However, I can take shorter showers to help save water. I could also reduce my water use for watering the lawn because it does not have to be perfectly green, it can be a little brown in order to save water. 
4. a. I could use impure water for washing a car.           b. This water could be taken from washing dishes.