Struggling with Chemistry Lab Equations?

[pp2000]

hi everyone

I'm having problem with these 3 questions that i have to answer for my lab and i was wondering if any of u guys could help me out on these...

any help would be appreciated...

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1. so there are the equations and what the question is asking is to write the complete chemical equations and the state of each compound ( The equations should be balanced...)

*charge

MgCl2 + NaOH ---> Products (balanced)
FeCl3 + NaOH
BaCl2 + Na2SO4
CaCl2 + AgNO3
Pb(NO3)2 + Kl
Na2CO3 + HCL
NH4Cl + NaOH

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2. Q: Biosphere II was created in 1991 to test the idea that scientists could build a sealed, self-sustaining ecosystem. The carbon dioxide levels in Biosphere II were lower than scientists had predicted. Scientists discovered that the carbon dioxide was reacting with calcium hydroxide, a basic compound in the concrete.

a) Write two balanced questions to show the reactions. Then classify the reactions,. Hint: In the first reaction, carbon dioxide reacts with water in the concrete to form hydrogen carbonate. Hydrogen carbonate, an acid, reacts with calcium hydroxide, a base.

b) Why do you think scientists failed to predicts that this would happen?

c) Suggest ways that scientists could have combatted the problem.



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3. Using Balanced Chemical Equation Represent: ( sulfur dioxide reacts with oxygen to form sulfur trioxide, which in turn reacts with liquid water to form sulfuric acid)

a) the formation of the sulfur trioxide in an engine.
b) the reactions of sulfur trioxide in out atmosphere.

 

[symbolipoint]

Your question set from number 1:

complete chemical equations and the state of each compound ( The equations should be balanced...)

*charge

MgCl2 + NaOH ---> Products (balanced)
FeCl3 + NaOH
BaCl2 + Na2SO4
CaCl2 + AgNO3
Pb(NO3)2 + Kl
Na2CO3 + HCL
NH4Cl + NaOH

Look for results that will produce either precipitates, or a weaker base. The reactants listed in each line are all soluble by themselves.

 

[Blueshift5]

Hi there, I would be happy to help with your questions. As a chemist, I understand the importance of having a strong understanding of chemical equations and reactions.

1. To write the complete chemical equations and state of each compound, we first need to understand the reactants and products in each equation. Let's take the first one as an example: MgCl2 + NaOH --> Products (balanced). The reactants are magnesium chloride (MgCl2) and sodium hydroxide (NaOH). The products can be written as Mg(OH)2 + NaCl. You can see that the equation is now balanced, as there are equal numbers of each element on both sides. The state of each compound can be indicated by writing (s) for solid, (l) for liquid, (g) for gas, or (aq) for aqueous (dissolved in water). In this case, MgCl2 and NaOH are both solids, so the equation would be written as MgCl2 (s) + NaOH (s) --> Mg(OH)2 (s) + NaCl (s). You can follow this same process for the remaining equations.

2. a) Two balanced equations for the reactions taking place in Biosphere II could be: CO2 (g) + H2O (l) --> HCO3- (aq) + H+ (aq), and HCO3- (aq) + Ca(OH)2 (s) --> CaCO3 (s) + 2H2O (l). These reactions can be classified as acid-base reactions, as an acid (HCO3-) is reacting with a base (Ca(OH)2).

b) Scientists may have failed to predict this reaction because they may not have taken into account the presence of the basic compound, calcium hydroxide, in the concrete. They may have assumed that the carbon dioxide would simply dissolve in the water without reacting.

c) To combat this problem, scientists could have used a different type of concrete that does not contain calcium hydroxide, or they could have added a neutralizing agent to the concrete to prevent the reaction from occurring. They could also have monitored the carbon dioxide levels more closely and made adjustments as needed.

3. a) The formation of sulfur trioxide in an engine can be represented by the balanced equation: 2SO2 (g) + O2 (g) --> 2