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Lady bird [3.3K]
3 years ago
15

Luke and Sian want to plant a vegetable garden in their yard. A soil testing kit measures the soil pH at 5.0, but the lettuce th

ey want to plant does best at a pH of 6.5. Should they add an acid or a base to the soil to make it the optimum pH for growing lettuce?
Chemistry
1 answer:
dexar [7]3 years ago
4 0

Answer:

So, Luke and Sian has to increase the pH of the soil by adding base to it.

Explanation:

The pH is defined as the negative logarithm of the hydrogen ion concentration in their aqueous solution.

pH=-\log[H^+]

  • With increase in hydrogen ion concentration the pH value decreases.
  • With decrease in hydrogen ion concentration the pH value increases.

The pH of the soil after testing it on a kit comes out be 5.0, but they both need pH of the soil to 6.5.

Comparison of pH of soil:

  =  5.0 < 6.5

= High hydrogen ion concentration > High hydrogen ion concentration

So, Luke and Sian has to increase the pH of the soil by adding base .Doing so will decrease the hydrogen ion concentration in the soil (where as addition of acid lower the pH of soil).

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λ = 0.0167 m = 16.7 mm

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λ = Wavelength = ?

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The formula to find yield is

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Alex_Xolod [135]
<span>Answer: option B. 3.07 g

Explanation:

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S(s) + O₂ (g) → SO(g)

2) Balanced chemical equation:

</span><span>2S(s) + O₂ (g) → 2SO(g)

3) Theoretical mole ratios:

2 mol S : 1 mol O₂ : 2 mol SO

3) number of moles of 4.5 liter SO₂ at</span><span> 300°C and 101 kPa

use the ideal gas equation:

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=> n = pV / (RT) =

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n = 0.0954 mol SO

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-------------- = ----------------------
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=> x = 0.0954 mol S.

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mass = number of moles × atomic mass

mass = 0.0954 mol × 32.065 g/mol = 3.059 g of S

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Answer:

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