Answer:
Here's what I get
Explanation:
3. Molar concentration by formula.

(i) Comparison of molar concentrations
The formula gives a calculated value of 0.5302 mol·L⁻¹.
Dimensional analysis gives a calculated value of 0.1767 mol·L⁻¹.
The first value is three times the second.
It is wrong because the formula assumes that the acid supplies just enough moles of H⁺ to neutralize the OH⁻ from the NaOH.
Instead, I mol of H₃PO₄ provides 3 mol of H⁺, so your calculated concentration is three times the true value.
(ii) When is the formula acceptable?
The formula is acceptable only when the molar ratio of acid to base is 1:1.
Examples are
HCl + NaOH ⟶ NaCl + H₂O
H₂SO₄ + Ca(OH)₂ ⟶ CaSO₄ + 2H₂O
H₃PO₄ + Al(OH)₃ ⟶ AlPO₄ + 3H₂O
Answer:
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Explanation:
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It important to test the crucible for cracks before heating it because it can break while performing the chemical reaction.
The crucible and the lid should be inspected to check for the before heating it to prevent the breaking while performing the reactions. if there are some breaks in the crucible then if we heat the crucible it can lead to breaking of the whole crucible and the material from the crucible to come out and it will come in contact with the lid.
The crucible plays a important role while preforming the reactions, so. it important to check the cracks of the crucible before the heating of the crucible.
To learn more about crucible here
brainly.com/question/10237849
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Answer:
Add more substrate.
Explanation:
First let's explain why all the other options are wrong:
- The problem states that we <u>have optimum pH and optimum temperature</u>, this means that any change to those factors (increasing or decreasing) would slow down the reaction.
- <u>An inhibitor is called that way because its presence slows downs the reaction</u>, so more inhibitor would not speed up the reaction.
A <em>competitive inhibitor</em> is a substance that resembles the substrate that normally reacts with the enzime, so it binds to the enzime's active sites and prevents the substrate from doing so. Adding more substrate makes it more likely than a substrate molecule binds to an enzime's active site instead of the inhibitor ("it will outcompete the inhibitor and increase the reaction rate").
Answer: D
Explanation: Because it is irrelevant to the summary's purpose, which is to summarize your experiment.
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