Chemistry, 20.11.2019 17:31 jules8022

Now that we have put a coefficient of 3 in front of caso4 and a coefficient of 3 in front of cacl2, what coefficient should go in front of alcl3 to balance both the cl atoms and the al atoms?
3caso4 + ? alcl3 --> 3cacl2 + al2(so4)3

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Answer from: iwannabewinston

The coefficient of AlCl₃ should be 2

Explanation:

In the given reaction, calcium sulphate (CaSO₄) reacts with aluminium chloride (AlCl₃) to give calcium chloride (CaCl₂) and aluminium sulphate (Al₂(SO₄)₃)

In a balanced chemical equation, quantity of elements on the left side or reactant side should be equal to the quantity of elements on the right side or product side of the chemical reaction, according to the law of conservation of mass.

On reactant side, there are 3 calcium atoms, 3 sulphur atoms and 12 oxygen atoms in 3CaSO₄ and 1 aluminium atom and 3 chlorine atoms in AlCl₃.

Whereas, on the product side, there are 3 calcium atoms, 6 chlorine atoms in 3CaCl₂ and 2 aluminium atoms, 3 sulphur atoms, and 12 oxygen atoms in Al₂(SO₄)₃.

So, all the other atoms except aluminium (Al) and chlorine (Cl) atoms are not balanced in the given chemical equation.

Therefore, in order to balance the number of aluminium (Al) and chlorine (Cl) atoms, AlCl₃ is given the coefficient 2.

Now, there are 2 Al atoms, 6 Cl atoms, on the reactant as well as the product side of the chemical equation.

Therefore, the balanced chemical reaction is:

3CaSO₄ + 2AlCl₃ → 3CaCl₂ + Al₂(SO₄)₃

Answer from: Quest

Iwould google this

Answer from: Quest

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different. let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones). now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first. for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours. so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.

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