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The pH of a water sample is 2, and the molar concentration of [Na+] is 10mM. Assume that Cl- is the only other ion in

The pH of a water sample is 2, and the molar concentration of [Na+] is 10mM. Assume that Cl- is the only other ion in the water. Set up a charge balance expression for this system and calculate the [Cl-]. What common reagents were added to the water to make up this system?

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