what mass of C6H8O7 is needed to consume 0.42 g of NaHCO3  what mass of water is expected? (More info in description plz ive been at this 4 hours)   consuming products that contain sodium...

what mass of C6H8O7 is needed to consume 0.42 g of NaHCO3 

what mass of water is expected?

(More info in description plz ive been at this 4 hours) 

 

consuming products that contain sodium increases the concentration of sodium ions in the blood. Research the effect on the human body consuming too much sodium. Why is it important to keep carefull track of your sodium intake? 

Amonia NH3 is important starting material used to make a variety of products, including fertilisers and explosives. The chemical equation for the production of amonia is N2(g) + H2(g) ---> NH3(g) 

A) balance the equation 

B) perdict the moles of the amonia that can be made usimg 22.4 g of nitrogen and an unlimited amount of hydrogen. 

Lithium hydroxide, LiOH, reacts with carbon dioxide to produce lithium carbonate, Li2CO3. The chemical equation for this reaction is 2LiOH (S) + CO2(s) --> LiCO3 (s) + H2O (1) 

A)describe why the amount of lithium hydroxide present limits the amount of time astronauts can spend in space 

B) sodium hydroxide, NaOH, reacts the same as lithium hydroxide and is much cheaper. However, sodium hydroxide is about 40 percent heavier than lithium hydroxide. Why do you think NASA uses LiOH on its space missions?

3 Answers | Add Yours

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sanjeetmanna | College Teacher | (Level 3) Assistant Educator

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4 Question)

Lithium hydroxide, LiOH, reacts with carbon dioxide to produce lithium carbonate, Li2CO3. The chemical equation for this reaction is

2LiOH (S) + CO2(s) --> LiCO3 (s) + H2O (l) 

A)describe why the amount of lithium hydroxide present limits the amount of time astronauts can spend in space 

Answer

Lithium hydroxide is used in breathing gas purification systems for spacecraft.

Exhaled gas has a lot of Carbon dioxide in it, and re-inhaling this gas can eventually be deadly. So in these breathing gas masks, the lithium hydroxide which is used as a carbondioxide scrubbers for purification of gases reacts with the carbon dioxide to produce water and lithium carbonate, which are safe.

As the masks contain a limited amount of LiOH, after a certain time in space, all the LiOH would have been used to remove the CO2 from the astronauts breathing air. They have to replace the mask, So that's why they can only spend a limited time out in the space.

B) sodium hydroxide, NaOH, reacts the same as lithium hydroxide and is much cheaper. However, sodium hydroxide is about 40 percent heavier than lithium hydroxide. Why do you think NASA uses LiOH on its space missions?

Answer

2NaOH + CO2 → Na2CO3 + H2O

Since NaOH is strong base it is very corrosive and it is heavier than LiOH, So LiOH is prefered in space mission.

 

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sanjeetmanna | College Teacher | (Level 3) Assistant Educator

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1 Question)

what mass of C6H8O7 is needed to consume 0.42 g of NaHCO3 what mass of water is expected?

Answer

First we need the reaction involve C6H8O7 and NaHCO3

3 NaHCO3 + C6H8O7 → 3 CO2 + 3 H2O + Na3C6H5O7

Given is 0.42 gm of NaHCO3 Convert it into moles

0.42 gm of NaHCO3 =  0.42/84 = 0.005 moles.

Since from the reaction we can see that NaHCO3 and C6H8O7 are in 3:1 ratio, So when 0.005 moles of NaHCO3 reacts with 0.001 moles of C6H8O7.

So we found 0.001 moles of C6H8O7 reacting with 0.005 moles of NaHCO3(0.42 g)

Now we have to find the mass of 0.001 moles  of C6H8O7

mass = Moles * molar mass = 0.001 * 192 = 0.192 gm.

0.192 gm of C6H8O7 is consumes 0.42 gm of NaHCO3.

The amount of water expected would be 0.018 gm of H2O since after finding the limiting reactant we will get 0.001 moles of H2O which is equal to 0.018 gm of H2O.

2 Question) 

consuming products that contain sodium increases the concentration of sodium ions in the blood. Research the effect on the human body consuming too much sodium. Why is it important to keep carefull track of your sodium intake?

Answer 

When we study Na+/K+ pump, sodium-potassium pump, or sodium pump which is the part of active transport 

which help in regulating cell volume and transport mechanism, signal transduction etc.,

So the concentration of the Na and k has to be mentained if not it will leads to the imbalance of the cell.

cells containing relatively high concentrations of Potasium ions but low concentrations of Sodium ions. Export of sodium from the cell provides the driving force for several secondary active transporters thus controling the cell volume ....

3 Question) 

Amonia NH3 is important starting material used to make a variety of products, including fertilisers and explosives. The chemical equation for the production of amonia is N2(g) + H2(g) ---> NH3(g) 

A) balance the equation 

Answer 

N2 + 3H2 → 2NH3

B) perdict the moles of the amonia that can be made using 22.4 g of nitrogen and an unlimited amount of hydrogen.

 

Answer

First convert the given amount into moles 

22.4 gm of nitrogen

Moles =  mass/molar mass = 22.4/28.01 = 0.79 ≈ 0.8 moles.

And umlimited amount of Hydrogen means Hydrogen is in excess which means Nitrogen is limiting reactant.

We know that the amount of product depends upon the amount of limiting reactant.

N2 + 3H2 → 2NH3

Since from the reaction when we compare the mole ratio of N2 and NH3 they are in 1:2 ratio. that means 1 mole of N2 will form 2 moles of NH3,

Since we got 0.8 moles of N2, We have to find the moles of NH3 formed when 0.8 moles of N2 is involved 

= 1.6 moles of NH3.

So 1.6 Moles of NH3 is made when 22.4 g of Nitrogen and umlimited Hydrogen is involved.

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makiphobe | Student, Undergraduate | (Level 1) eNoter

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You can google the Na thing :)

A) N2 + 3H2---> 2NH3

B) Ar(N2)= 14x2=28

28 g of N2--> 1 mol

22.4 g of N2---> (1/28) x 22.4 mol= 0.8 mol

From the equation: 1 mol of N2 produces 2 mol of NH3

Thus: 0.8 mol of N2 will produce 1.6 mol of NH3

 

A) The CO2 that the crew exhales is removed from the air by a reaction within canisters of lithium hydroxide (and the water produced is then used).  If all the LiOH is used up in the reaction, the spacesuit will contain untolerably high levels of CO2. Excessive carbon dioxide could lead to respiratory acidosis. It makes the blood ph lower therefore making it acidic.

 

B) To decrease the volume of fuel used. Heavier spacecrafts require more fuel, which isn't cost-efficient.

 

 

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