x+HomeX CHE101 02: Intro to General Che xX101 Chem 101My Questions | bartlebyapp.101edu.coCUnofficial Transcri...Welcome to the O...myClackamas LoginW LogonOregon Scholarsh...Home - FAFSA on...The National Soc...AppsHW 4.4Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is used as anantacid in the reaction below. How many molecules of HCI would have to be present to form17.38 g of MgCl?7Mg(OH)2 (s)2 HCI (aq)2 H2O (I)MgCla (aq)Attempts remaining: 27:34 PMType here to searchENG11/13/2019

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Asked Nov 14, 2019
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HW 4.4
Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is used as an
antacid in the reaction below. How many molecules of HCI would have to be present to form
17.38 g of MgCl?
7
Mg(OH)2 (s)
2 HCI (aq)2 H2O (I)MgCla (aq)
Attempts remaining: 2
7:34 PM
Type here to search
ENG
11/13/2019
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x+ Home X CHE101 02: Intro to General Che x X 101 Chem 101 My Questions | bartleby app.101edu.co CUnofficial Transcri... Welcome to the O... myClackamas Login W Logon Oregon Scholarsh... Home - FAFSA on... The National Soc... Apps HW 4.4 Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is used as an antacid in the reaction below. How many molecules of HCI would have to be present to form 17.38 g of MgCl? 7 Mg(OH)2 (s) 2 HCI (aq)2 H2O (I)MgCla (aq) Attempts remaining: 2 7:34 PM Type here to search ENG 11/13/2019

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Expert Answer

Step 1

The given reaction is as follows:

Mg(OH), (s)+2HC1( aq)-2H,0+ MgCl, (aq)
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Mg(OH), (s)+2HC1( aq)-2H,0+ MgCl, (aq)

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Step 2

The given weight of MgCl2 is 17.38 g.

The molar mass of MgCl2 is 95.211 g/mol.

 

Therefore, the number of moles of MgCl2 is calculated by the formula.

Weight
Moles
Molar mass
17.38 g
95.211g /mol
=0.1825 mol
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Weight Moles Molar mass 17.38 g 95.211g /mol =0.1825 mol

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Step 3

From the given reaction it is clear that one mole of MgCl2 is formed by the reaction of one mole of Mg(OH)2 and two mol...

1mole of MgCl, = 2 mole of HCi
0.1825 mole of MgCl,
2x0.1825 mole of HCl
=0.365 mole of HCl
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1mole of MgCl, = 2 mole of HCi 0.1825 mole of MgCl, 2x0.1825 mole of HCl =0.365 mole of HCl

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