He is using the filtration method.
It’s a technique which is used for separation of solids and fluids by putting them through a medium which allows only fluid to pass through, leaving the solids (in this case the soil) alone.
The fluid that passed is called the filtrate.
Answer:
Two advantages are: Its cheap and it is a renewable energy source. Two disadvantages are it's not windy everyday and it will take up a lot of space for windmills.
Explanation:
Answer:
a. pH = 4.56
b. Change in pH = 0.85
c. Change in pH = 5.4
Explanation:
a. The pKa of lactic buffer is: 3.86.
Using Henderson-Hasselbalch formula for the lactic buffer:
pH = 3.86 + log [Lactate] / [Lactic acid]
<em>Where [] is molarity of each compound but could be taken as moles</em>
<em />
Replacing:
pH = 3.86 + log [0.050 moles] / [0.010 moles]
<em>pH = 4.56</em>
<em />
b. The HCl added reacts with Lactate producing lactic acid. Moles of HCl are:
5x10⁻³L * (0.5mol /L) = 0.025 moles HCl
Moles of lactate: 0.050moles - 0.025 moles = 0.025 moles
Moles lactic acid: 0.010 moles + 0.025 moles = 0.035 moles
pH = 3.86 + log [0.025 moles] / [0.035 moles]
<em>pH = 3.71</em>
Change in pH = 4.56 - 3.71 = 0.85
c. 1L of pure water has a pH of 7. 0.025 moles of HCl = 0.025 moles H⁺ in 1.005L:
0.025 mol / 1.005L = 0.0249M = [H⁺]
As pH = -log [H⁺]
pH = 1.6
Change in pH = 7.0 - 1.6 = 5.4
Ndeed, most of the alkene<span> addition </span>reactions<span> discussed earlier also take place ... This behavior is nicely </span>explained<span> by differences in the stages of the </span>hydrogenation reaction<span>. ... For </span>examples<span> and a discussion of </span>mechanisms<span> click here. ... to double bonds which </span>give<span> alcohol products, </span>addition of water<span> to alkynes </span>gives<span> ketone ...</span>