10 use the equation below to calculate the following a...

10. Use the equation below to calculate the following. a. Balance the reaction. ___ Ca(NO3)2 (aq) + ___ Na3PO4 (aq) → ___ Ca3(PO4)2 (s) + ___ NaNO3 (aq) b. Moles of Na3PO4 needed to react with 1.45 L of 0.225 M Ca(NO3)2 c. Volume of 0.250 M Na3PO4 needed to react with 15.00 mL of 0.500 M Ca(NO3)2 d. Grams of Ca3(PO4)2 that can be obtained from 125 mL of 0.500 M Ca(NO3)2 e. Molarity of Ca(NO3)2 when 40.00 mL react with 50.00 mL of 2.00 M Na3PO4

Transcript

00:02 Okay, let me get a better pen here.

00:04 We are asked to use a the equation so first of all our equation we are given the unbalanced chemical equation for potassium nitrate solution reacting with sodium phosphate also in solution.

00:28 I'm given the products of calcium phosphate that'll be the precipitate and sodium nitrate also so i'll need a three here a two here and a six here i'm gonna make those different colors three two and six so there's my balanced chemical equation and that is a b.

01:12 We are asked to find moles of sodium phosphate to react with one point four or five liters of zero point two two five molar calcium nitrate one point four five liters of calcium nitrate times zero point two two five moles per liter again calcium nitrate i have a three to two mole ratio for calcium nitrate to sodium phosphate let me get this one point four or five liters times point two two five times two divided by three would be zero point two one eight let me check my sig figs three three moles of sodium phosphate okay, that was my first problem c.

03:02 Find the volume of zero point two five zero molar sodium phosphate to react with 15 milliliters of 0 .5 0 .5 .00 molar calcium nitrate down a little bit 15 .00 milliliters times i'll go ahead and convert this to liters i should put my substance in there to converting to liters and multiplying by the molar mass excuse me multiplying by the molarity then i will use my mole ratio ratio of three to two again point oh one five times point five times two divided by three equals zero point zero zero five zero zero moles of sodium phosphate molarity will be equal to moles per liter.

05:20 What did i have here? moles of n a three oh four times zero point two five zero moles per liter.

05:46 I think i'll go with milliliters here will equal twenty point zero milliliters of sodium phosphate solution then that was c.

06:21 Let's go do d a lot of these here should have paid more attention mass in grams calcium phosphate from 125 milliliters of 0 .5 0 .5 .00 molar calcium nitrate, okay, i'm just gonna move my decimal this time 0 .125 moles excuse me 1 to 5 liters calcium nitrate times my molarity 0 .500 moles per liter what am i looking for here? so i'm gonna have a three and a one for my world mole ratio of calcium nitrate to calcium phosphate finally i'm going to do to ask me mass here...

Question

Please give Ace some feedback