# Chemistry problem I just can't solve! Help!?

Chlorine is used to disinfect swimming pools. The accepted concentration for this purpose is 1 ppm chlorine or 1 g of chlorine per million g of water. Calculate the volume of a chlorine solution (in milliliters) a homeowner should add to her swimming pool to achieve 1.00 ppm chlorine if the solution contains 6.00 percent chlorine by mass and there are 8.25 × 104 gallons of water in the pool. (1 gallon = 3.79 L; density of liquids = 1.00 g/mL.)

### 1 Answer

- Dr WLv 71 month ago
via that dimensional analysis you've been practicing lately.

.. 8.25x10^4gal H2O.. 3.79L.. 1.00g H2O.. .. 1g Cl.. .. . 100g Cl solution

---- ---- ---- ----- ------ x ---- --- x ---- ---- ---- x ------ ------ x ---- ---- ----- -----

.. ... .... .. . 1.. .. ... .. ... 1 gal.. ... .1 L H2O.. 10^6g H2O.. ... 6.00g Cl

.. ... .. .1 mL Cl solution

.. . .. x ----- ----- ----- ----- = __ mL Cl solution

.. ... .. . .1g Cl solution

you get to finish! don't forget the sig figs

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