00:01
Hello students, let's begin with this question.
00:03
Here the molarity and the volume of hcl is given which is equals to 0 .480 molar and here the volume of hcl is equals to 18 .20 ml.
00:18
So, this is equals to 18 .20 divided by 1000 to convert this into liter which is equals to 0 .0182 liter.
00:28
So, here we have to find out the percentage of na2co3 in a sample.
00:33
So, here firstly the reaction is the 1 mole of na2co3, this will react with 2 moles of hcl to give 2 moles of nacl plus 1 mole of h2o and 1 mole of co2.
00:48
So, here the moles of the hcl is equals to, so moles is equals to molarity multiplied by the volume.
01:01
So, here the molarity is 0 .480 molar multiplied by 0 .0182 liter.
01:09
So, here these moles comes to be 0 .008736 moles...