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02.01.2021 •
Chemistry
How many mL of 0.105 M aqueous NaOH solution are required to neutralize 40.0 mL of 0.210 M aqueous H2SO4 solution? H 2SO 4 + 2 NaOH ---> Na 2SO 4 + 2 H 2O
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Ответ:
The volume of the NaOH solution required for the reaction is 160 mL
The balanced equation for the reaction is given below:
H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O
From the balanced equation above,
The mole ratio of the acid, H₂SO₄ (nA) = 1The mole ratio of the base, NaOH (nB) = 2Finally, we shall determine the volume of the base, NaOH required for the reaction.
Molarity of the base, NaOH (Mb) = 0.105 MVolume of the acid, H₂SO₄ (Va) = 40 mL Molarity of the acid, H₂SO₄ (Ma) = 0.210 M Volume of the base, NaOH (Vb) =?MaVa / MbVb = nA/nB
(0.21 × 40) / (0.105 × Vb) = 1 / 2
8.4 / (0.105 × Vb) = 1 / 2
Cross multiply
0.105 × Vb = 8.4 × 2
0.105 × Vb = 16.8
Divide both side by 0.105
Vb = 16.8 / 0.105
Vb = 160 mL
Thus, the volume of the base, NaOH required for the reaction is 160 mL
Learn more about stoichiometry: link
Ответ:
160 mL
Explanation:
Given data:
Molarity of NaOH = 0.105 M
Volume of H₂SO₄ = 40.0 mL (40.0/1000 = 0.04 L)
Molarity of H₂SO₄ = 0.210 M
Volume of NaOH required = ?
Solution:
Number of moles of of H₂SO₄:
Molarity = number of moles / volume in L
0.210 M = number of moles / 0.04 L
Number of moles = 0.210 mol/L × 0.04 L
Number of moles = 0.0084 mol
now we will compare the moles of H₂SO₄ with NaOH.
H₂SO₄ : NaOH
1 : 2
0.0084 : 2/1×0.0084 = 0.0168 mol
Volume of NaoH:
Molarity = number of moles / volume in L
0.105 M = 0.0168 mol / Volume in L
Volume in L = 0.0168 mol / 0.105 M
Volume in L = 0.16 L
Volume in mL:
0.16 L × 1000 mL/ 1L
160 mL
Ответ:
Check Explanation
Step-by-step explanation:
Some information required to answer this question is missing, but on a general basis, here goes the carefully researched response.
Majority of popular truck ladders are about 75 to 105 feet long. There are special truck ladders that reach up to 125 feet.
The length of a truck ladder is naturally limited by weight. The weight has to not be too much so that the truck can still move at a good enough speed on the roads. The weight of these ladders are primarily dependent on the strength of the metal used to make them.
At the top of these ladders, on a windy day, eind interference can cause the ladder to move back and forth all over the place, rhereby endamgerimg lives further and using a light material because we want the truck to still be able to move, will not work because light ladders especially, are easily carried by wind.
The 105-foot aerial ladder can reach 7 to 8 floors depending on the height of the floors.
The 25th floor of an office building can be accessed using a ladder that is about 225 ft long and that simply, is not feasible at all to manufacture this ladder considering the required weight and how too far away in the air this ladder would be, there would be little or no control over this.
Hence, a more realistic solution would be an helicopter that is steadied to slowly get people out of that floor.
Also, if the elevators or stairs are still accessible, these are better alternatives than a 225 ft long ladder aiming to reach the 25th floor.
Hope this Helps!!!