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#### hushula

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« on: September 25, 2004, 01:26:28 PM »
hello i am trying to do this problem as one of my chemistry online quizzes. the problem is :

Morton Lite SaltĀ® has 290 mg of sodium (as Na+) and 340 mg of potassium (as K+) per 0.25 teaspoon. Assume that 1.0 teaspoon of the Lite Salt has a mass of 6.0 g and that the Na+ comes from NaCl and the K+ from KCl. Calculate the mass percent of NaCl and of KCl in Lite Salt.

I tried working it out and i got 48% and 52% respectively but it's saying that its the wrong answer. please help. THNAK YOU

#### Demotivator

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« Reply #1 on: September 25, 2004, 04:55:49 PM »
You are assuming that Na,  K and Cl are the only things in the salt. Not necessarily so, meaning the sum of the NaCl and KCl  could be less than 100%.
Calculate each % mass separately using the 6.0 g as the total mass in the denominator.

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