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Simple equality will do here as you have three things and require a fourth.

(X L)(2.5 M NaOH) = (2.0 L)(0.75 M NaOH)

2.5X = 1.5

X = 0.60 Liters needed

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how many milliliters of 2.25M NaOH is needed to make 125mL of 0.75M NaOH solution

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Q: What volume of 2.5 M NaOH solution is required to prepare 2.0 liters of a 0.75M NaOH?
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