The town of Andover obtains drinking water from three sources that together produce up to 6.81 × 107 L per day. If effective flocculation requires 9.248 × 10-5 M iron(III) chloride, how many grams of calcium hydroxide are required for treating one day’s worth of water? b. You decide to test a new mixing protocol to see if you can improve the efficiency of contaminant removal. In a smaller container, you combine 125.0 mL of 0.25 M calcium hydroxide with 115 mL of 0.15 M iron(III) chloride. i) How many grams of iron(III) hydroxide will be produced?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
3. One strategy employed by water treatment plants, called flocculation, involves adding solid iron(III) chloride and calcium hydroxide to water. The iron cations react with the hydroxide ions to form large precipitates (solids) that trap and remove contaminants as they sink to the bottom of the treatment basin:
2 FeCl3 (aq) + 3 Ca(OH)2 (aq) ---> 2 Fe(OH)3 (s) + 3 CaCl2 (aq)
a. The town of Andover obtains drinking water from three sources that together produce up to 6.81 × 107 L per day. If effective flocculation requires 9.248 × 10-5 M iron(III) chloride, how many grams of calcium hydroxide are required for treating one day’s worth of water?
b. You decide to test a new mixing protocol to see if you can improve the efficiency of contaminant removal. In a smaller container, you combine 125.0 mL of 0.25 M calcium hydroxide with 115 mL of 0.15 M iron(III) chloride.
i) How many grams of iron(III) hydroxide will be produced?
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