What is the percent by mass of NaHCO3 and KCl in the mixture.
something else has to be given
And what's that got to do with Kc?
To find the percent by mass of NaHCO3 and KCl in the mixture, you need to know the masses of NaHCO3 and KCl in the mixture. Assuming you have that information, follow these steps:
Step 1: Find the total mass of the mixture.
Add the mass of NaHCO3 and KCl together to get the total mass of the mixture.
Step 2: Calculate the percent by mass of NaHCO3.
Divide the mass of NaHCO3 by the total mass of the mixture and multiply by 100 to get the percent by mass of NaHCO3.
Step 3: Calculate the percent by mass of KCl.
Divide the mass of KCl by the total mass of the mixture and multiply by 100 to get the percent by mass of KCl.
So, to summarize:
Percent by mass of NaHCO3 = (mass of NaHCO3 / total mass of the mixture) x 100
Percent by mass of KCl = (mass of KCl / total mass of the mixture) x 100
To find the percent by mass of NaHCO3 and KCl in the mixture, you need to know the mass of NaHCO3 and KCl as well as the total mass of the mixture.
Here are the steps to calculate the percent by mass:
1. Find the mass of NaHCO3 and KCl:
If you have a sample of the mixture, you can weigh it on a balance to find the mass of the entire mixture.
2. Separate the NaHCO3 and KCl:
To do this, you can dissolve the mixture in water, which will dissolve the NaHCO3 but not the KCl. Filter the mixture to separate the insoluble KCl from the solution containing NaHCO3.
3. Dry and weigh the separated NaHCO3:
Evaporate the water from the solution obtained in the previous step, leaving behind NaHCO3 as solid. Dry it thoroughly to remove any remaining water, then weigh the solid NaHCO3.
4. Calculate the mass of KCl:
To find the mass of KCl in the mixture, subtract the mass of NaHCO3 (obtained in step 3) from the total mass of the mixture (obtained in step 1).
5. Calculate the percent by mass of NaHCO3 and KCl:
Divide the mass of NaHCO3 (obtained in step 3) and KCl (obtained in step 4) by the total mass of the mixture (obtained in step 1). Multiply the result by 100 to convert it to a percentage.
For example, let's say you have a mixture weighing 50 grams, and after separation and drying, you find 10 grams of NaHCO3 and 30 grams of KCl.
The percent by mass of NaHCO3 would be (10 / 50) x 100 = 20%.
The percent by mass of KCl would be (30 / 50) x 100 = 60%.
Therefore, in this example, the mixture contains 20% NaHCO3 and 60% KCl by mass.