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CALCULATIONS Flease show all work for full credit7) Toxic levels of lead are 5 UGIdL in the blood of children and 10 ugIdL in the blood of adults: If the lead leve...

Question

CALCULATIONS Flease show all work for full credit7) Toxic levels of lead are 5 UGIdL in the blood of children and 10 ugIdL in the blood of adults: If the lead levels Wcr measured at 5 "mlvand child with 25L of blood drank of that water; would they be at risk of lead toxicity? Justify your ancer with calculations (12 points)

CALCULATIONS Flease show all work for full credit 7) Toxic levels of lead are 5 UGIdL in the blood of children and 10 ugIdL in the blood of adults: If the lead levels Wcr measured at 5 "mlvand child with 25L of blood drank of that water; would they be at risk of lead toxicity? Justify your ancer with calculations (12 points)



Answers

Lead is a poisonous metal that especially affects children because they retain a larger fraction of lead than adults do. Lead levels of 0.250 ppm in a child cause delayed cognitive development. How many moles of lead present in $1.00 \mathrm{~g}$ of a child's blood would 0.250 ppm represent?

Yeah mm. In problem # 105. We are asked if this person should be concerned with the effects of lead poisoning and the person in question has a concentration of lead of 2.5 times 10 To the negative 4th grams per liter. Okay, in their blood. And we're told that anything greater than 10 micrograms per deciliter is concerning. So we need to convert this two micrograms podesta leader so that we can compare these. Currently we can't compare them because they're in two different sets of units. So I'm going to compare or convert this concentration of lead in this person's blood, two micrograms per deciliter. So first let me work with The g two micrograms In one g of anything. There are one times 10 to the 6th micrograms. Right? So this would convert from grams of lead to micrograms of lead. And then we get me to get from leaders to desolate. Urz. So Jesse means 1/10. So in one leader There would be 10 vessel leaders. Because the desolate is just 1/10 of a leader, you would need 10 of them to make a full leader. So this would cancel leaders for us. And when we calculate this answer, it is going to be in micrograms per desolate. Er So let's see what we get. When we calculate this, we get 25 micrograms per desolate. So yes, 25 micrograms per deciliter Is greater than 10. So yes, indeed. Um There is a danger healthy effects of lead poisoning in this person. Mhm. Due to the concentration of the lead in their blood. Mhm. All right. So that is our answer and why? So, it's because the concentration is higher than the maximum recommended amount. Thanks for watching.

In this question, we're told that the threshold for lead poisoning is 10 micrograms per decile leader. So any value greater than this would be in danger for lead poisoning. So we're told that Child has a level of 25 times 10 to the -6 grams per liter of lead and the bloodstreams. Let's convert this two micrograms per deciliter, one microgram 10 to the -6 g 10 to the -4 leaders. one Desa leader. And this gives us 0.25 micrograms per deciliter. So comparing this to the threshold, uh this here is below the threshold. Mhm. Therefore this person mm. Mhm. It is not in danger yeah. Of lead poisoning. Mhm. Uh huh.

Okay, so we're looking for the moles of PB in one liter of solution. Okay, so we know that we're starting with 100 micrograms in one leader. So let's go ahead and change micrograms two g And then there's 10 to the six micrograms in one g. And then let's go ahead and change grams to malls It's led. So the molar masses to 7 to so We should have 4.8 Time to turn the -7 malls of PB. And each leader of solution. Now we're gonna try to find the parts per million. So parts per million is going to be the mass of our salute, which is our lead divided by the mass of our solution Times 10 to the 6th. So I know I have one leader of solution. So that will be 1000 ml. And we've been told to consider the density one. So that's going to be 1000 g of solution. And we know that we have 100 micrograms of our PB. So again, let's go ahead and change micrograms two g 1/10 to the 6th. So that gives us one Times 10. The -4 g. So now we've got our grams of salute and grams of solution so we can go ahead and plug into our equation. Parts per million is one time. Send a negative four g of lead and we'll divide that by our 1000 g of solution, Multiply by 10 to the 6th. And we see that it will be 0.10 parts per million.

Hire a monster in this question. There's ladies a heavy metal that remains in the bloodstream causing mental retardation in the Children. It is believed that three international minus seven g of laid in one ml of blood is health hazard for this amount of lead. How many items are played? Are there in one ml of child's blood? Okay. So given data given W but it's three into 10 days to -7 grandpa. Our leaders then I need to hear no molecular weight of ledge and mom Light that it's 207 man. Next number of atoms of light caution mark. So a part we know that really is equal to W. Euphonium. So the please three to English to -7. Divided by yes 2 0 son. Point to that is equal to 0.0 van 4479 In 2 10 days to -7 months, nine months. Therefore, Yanez equality. Therefore young is equal to 0.014479 In 210 National -7 months. Then be part the more of items Number. Rocks. That's right. Here it comes baby. Mhm. That is equal to Yeah. Yeah. I need to anna. So that is equal to learn is 1.4479-10 National -9 into an a 6.02 into a national 20. And that is equal to 8.72 into $10 to 14 items. And therefore, yeah. Uh huh. Yeah. How about therefore expected? That's right. Mhm. So, I'm on a lot of number of lead items. A model late items. Mhm items. Yeah. in one ml of chinese blood. Yeah. Good. Mm hmm. James blood Is the call to 8.72. Then there's 2 14 our camps. Thanks a lot.


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