Chem Lab C

[N0sm4]

Ok so let’s get this question marathon started

So I am going to start off with a relatively easy question

1. If you have 30 mL of 0.2 M NaOH, how many liters of 0.3 M HNO₃ is required to turn the phenol red indicator in the solution red.

[Mayur917]

Ok so let’s get this question marathon started

So I am going to start off with a relatively easy question

1. If you have 30 mL of 0.2 M NaOH, how many liters of 0.3 M HNO₃ is required to turn the phenol red indicator in the solution red.

Click to Show Answer

Strong Acid + Strong Base » Neutral solution + H2O
HNO3 (aq) + NaOH (aq) » NaNO3 (aq) + H2O (l)

Molar ratios are all 1 so we can proceed with M1V1 = M2 V2

(0.2 M) (0.03 L) = (0.3) (V2)
0.02 L = V2
20 mL are required to turn the phenol red indicator into the solution red.

Is that the correct answer?

[N0sm4]

Ok so let’s get this question marathon started

So I am going to start off with a relatively easy question

1. If you have 30 mL of 0.2 M NaOH, how many liters of 0.3 M HNO₃ is required to turn the phenol red indicator in the solution red.

Strong Acid + Strong Base » Neutral solution + H₂O
HNO₃ (aq) + NaOH (aq) » NaNO₃ (aq) + H₂O (l)

Molar ratios are all 1 so we can proceed with M₁V₁ = M₂ V₂

(0.2 M) (0.03 L) = (0.3) (V₂)
0.02 L = V₂
20 mL are required to turn the phenol red indicator into the solution red.

Is that the correct answer?

Yeah and also a note for next time remember to put your answer in between answer tags or in a spoiler.

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[answer]Your answer/work here[/answer]

Your turn now.