Lead Ii Chloride Molar Mass

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what mass of lead(Ii) chloride tin can be dissolved in 250 ml of .1M Atomic number 82(NO3)2?

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Hello there in this question. We are trying to prepare a solution of chloride ions and wanted to be a certain polarity. So first of all let's talk well-nigh what polarity is. We wanted to be point zero 358 Mueller. So what that means is .0358 moles of cl minus ions in every leader of solution. Considering modularity is nigh per liter. And so we need this many moles of chloride ions in every leader of solution. And the substance that we're getting the chloride ions from is fe three chloride. So we demand to write its formula and determine its molar mass. So atomic number 26 three means information technology's charges 3 plus Chloride has a 1- charge because it'due south a element of group vii. So this must be FECL three and FECL three has a molar mass of 100 and 62.20 g per mole by adding together the atomic masses or the molar masses of atomic number 26, i iron and iii chlorides. It's 162.2. All right, and then we take this information. Nosotros as well know that nosotros desire to brand 625 million liters of this. So that'southward what I'm going to start with. I want to start with that 625 ml of solution. That's how much nosotros're trying to brand observe that has three meaning digits. The polarity also has three significant digits. So when we do get to our reply we need to round it to three pregnant digits. Okay, so I have milliliters of solution but I noticed my equality for polarity is per liter. And so the outset thing I want to do is convert this from mel leaders to leaders In 100 ml of solution, It'southward equal to ane liter of solution. All right at present I have leaders. Leaders cancels. So now I have leaders and I can apply my molar itty that equality that tells me how many moles of chloride ions there volition exist in every leader of solution And that is nil 358 moles of chloride ions in every leader of solution. So leaders of solution cancel. At present I have moles of chloride ions But ultimately I want to know how many g of FECL three. So I need to look at that formula of FECL three. And I noticed that For every mole of FECL three I would produce 3 moles of chloride ions considering the formula tells me that For every formula unit of FECL 3 there would be three chloride ions. So if I have a mole of a physical three I would take 3 moles of chloride ions. Okay, so moles of chloride ions and abolish at present. And my final stride will exist to use that molar mass in one mole of FECL iii. There are 162.20 g. Alright molds of that council. Then we are fix to calculate our answer And rounded to three meaning digits. We want to know how many grams of this iron three chloride. We need to prepare the solution And calculating this tells the states that nosotros demand 1.21 grams Of the FECL three. So to summate this, nosotros took the numbers that are in the numerator and multiply those all together and then we divided by each number we see in the denominator. And then i.21 g of FECL three is our reply. Thank you then much for watching.