for each of the following synthesis reaction indentify the missing reactant(s) or product(s) and then balance the resulting equation
a) Mg +__________ ----------> MgO
b) _________ + O2-----------> Fe2O3
c) Li + Cl2 -------> _________
d) Ca + __________------> CaI2
Tell me what you don't understand about these problems. It appears obvious to me that the first one must have O2 added to it to obtain MgO.
Mg + O2 ==> MgO, then balance by
2Mg + O2 ==> 2MgO
The others are done the same way.
so for B) would it be 2Fe2O3?
c) 1LiCl2
d) 2Cal2
B is Fe + O2 ==> Fe2O3. then balance to give
4Fe + 3O2 ==> 2Fe2O3
C is Li + Cl2==> LiCl (the valence of Li is 1 and Cl is 1; therefore, the formula is LiCl. Then balance.
d. Ca + I2 ==> CaI2, then balance.
so C is 1Li1Cl
d is Ca2l2?
C is
Li + Cl2 ==> LiCl, then if you want to balance it it is
2Li + Cl2 ==> 2LiCl (Placing a 1, as in Li1Cl, is not wrong BUT no one does it BECAUSE if we write Li we imply there is one of Li; therefore, we don't write the 1s, only numbers that are not 1. )
I don't know where you get Ca2I2?
Ca + I2 ==> CaI2 and it is balanced as is.
To balance each synthesis reaction, we need to determine the missing reactant(s) or product(s) and then balance the equation by ensuring that the number of atoms on each side of the equation is equal. Let's go through each reaction step by step:
a) Mg + ___________ → MgO
In this reaction, we need to determine the missing reactant. Since magnesium (Mg) combines with oxygen (O) to form magnesium oxide (MgO), the missing reactant is oxygen gas (O2). So the balanced equation would be:
2Mg + O2 → 2MgO
b) _________ + O2 → Fe2O3
To balance this equation, we need to find the missing reactant. Since oxygen gas (O2) combines with iron (Fe) to form iron(III) oxide (Fe2O3), the missing reactant is iron. So the balanced equation would be:
4Fe + 3O2 → 2Fe2O3
c) Li + Cl2 → ___________
To balance this equation, we need to determine the missing product. Since lithium (Li) reacts with chlorine (Cl2), the product formed is lithium chloride (LiCl). So the balanced equation would be:
2Li + Cl2 → 2LiCl
d) Ca + ___________ → CaI2
For this reaction, we need to find the missing reactant. Since calcium (Ca) reacts with iodine (I2) to form calcium iodide (CaI2), the missing reactant is iodine. So the balanced equation would be:
Ca + I2 → CaI2
By identifying the missing reactants or products in each synthesis reaction and balancing the equations accordingly, we ensure that the number of atoms on both sides of the equation are equal, satisfying the law of conservation of mass.