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Elina [12.6K]
4 years ago
9

Derek needs a tool that delivers 25.00 mL of a sodium hydroxide solution. What tool would be best for him to use?

Chemistry
1 answer:
3241004551 [841]4 years ago
4 0
He may use a pipette with a volume greater than 25 ml to transfer the solution.
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What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutraliza
puteri [66]

Answer:

The answer is 0.75M HCl

Explanation:

To calculate the concentration of 10 ml of HCl that would be required to neutralize 50.0 mL of 0.150 M NaOH, we use the formula:

To calculate the concentration of 10 ml of HCl that would be required to neutralize 50.0 mL of 0.150 M NaOH, we use the formula:

C1V1 = C2V2

C1 = concentration of acid

C2 = concentration of base

V1 = volume of acid

V2 = volume of base

From the information supplied in the question:

concentration of acid (HCl) is the unknown

volume of acid (HCl) = 10ml

concentration of base (NaOH) = 0.15M

volume of base (NaOH) = 50ml

C1 x 10ml = 0.15M x 50ml

C1 x 10 = 7.5

divide both side by 10

C1 = 0.75M

concentration of acid (HCl) is 0.75M

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Answer:

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Map<br> Formulate your hypothesis.<br> List down the materials.<br> • Write the methods.
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Answer:

How to Formulate an Effective Research Hypothesis

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Read 2 more answers
For the reaction 2H2 + O2 --&gt; 2H2O, how many grams of oxygen are needed to react 3 moles of hydrogen?
mr Goodwill [35]

Answer:

48 grams

Explanation:

The chemical equation for the reaction is the following:

2 H₂ + O₂ → 2 H₂O

That means that 2 moles of H₂ react with 1 mol of O₂ to produce 2 moles of H₂O. We convert the moles of oxygen (O₂) by using the molecular weight (MW) as follows:

MW(O₂) = 16 g/mol x 2 = 32 g/mol

mass of O₂ = 1 mol x 32 g/mol = 32 g

So, we have the following stoichiometric ratio: 32 g O₂/2 moles H₂. We have 3 moles of hydrogen (H₂), so we multiply the moles by the stoichiometric ratio to calculate how many grams are needed:

3 moles H₂ x 32 g O₂/2 moles H₂ = 48 g O₂

<em>Therefore, 48 grams of O₂ are needed to react with 3 moles of H₂.</em>

4 0
3 years ago
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