For the analysis of trace metals it is necessary to prepare solutions of very low concentrations from a stock solution of higher concentration using a micropipette and a volumetric flask. What volume of a 0.0020M solution of Zn(NO3)2 (aq) would be required to prepare 200 nM solution of Zn2* in a 50mL flask?

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**Preparation of Dilute Solutions for Trace Metal Analysis**

For the analysis of trace metals, it is necessary to prepare solutions of very low concentrations. This is done by diluting a stock solution of higher concentration using a micropipette and a volumetric flask. 

### Problem Statement

What volume of a 0.0020 M solution of Zn(NO₃)₂ (aqueous) would be required to prepare a 200 nM solution of Zn²⁺ in a 50 mL flask?

### Options

- 25 μL
- 5.0 μL
- 2.5 μL
- 0.25 μL
Transcribed Image Text:**Preparation of Dilute Solutions for Trace Metal Analysis** For the analysis of trace metals, it is necessary to prepare solutions of very low concentrations. This is done by diluting a stock solution of higher concentration using a micropipette and a volumetric flask. ### Problem Statement What volume of a 0.0020 M solution of Zn(NO₃)₂ (aqueous) would be required to prepare a 200 nM solution of Zn²⁺ in a 50 mL flask? ### Options - 25 μL - 5.0 μL - 2.5 μL - 0.25 μL
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