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3 years ago

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12. Study the chemical reaction below, what are the product(s) in the reaction and what are the reactant(s) in the reaction (Sho

rt answer)
Aluminum + copper chloride ---> copper + aluminum chloride

1 answer:

natita [175]3 years ago

5 0

Explanation:

The reactants are Aluminium and Copper chloride.

The products are Copper and Aluminium chloride.

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Who discovered electrons

natulia [17]

J.j. Thomson discovered them

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2 years ago

Read 2 more answers

A clear liquid in an open container is allowed to evaporate. after three days a solid residue is left. was the original liquid a

gizmo_the_mogwai [7]

The clear liquid was allowed to evaporate and after 3 days, only solids are left. Therefore this means that for the 3 days it was exposed to air, some liquid or water perhaps was leaving out of the solution. Therefore this means that the liquid was a mixture. It was a initially a mixture of the solid residue plus the evaporated liquid.

It cannot be an element or a compound since both uniformly evaporates.

Answer:

<span>Mixture</span>

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3 years ago

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 18.0 g of luminol to H2O creating

Bond [772]

Answer:

Part A. 1.355 mol/L

Part B. 0.100 mol

Part C. 74.0 mL

Explanation:

Part A.

The molar mass of luminol is 177.16 g/mol, so the number of moles at 18.0 g is:

n = mass/molar mass

n = 18.0/177.16

n = 0.1016 mol

The molarity is the number of moles divided by the volume (0.075 L)

C = 0.1016/0.075

C = 1.355 mol/L

Part B.

The number of moles is the molarity multiplied by the volume, so:

n = 5.00x10⁻² mol/L * 2.00 L

n = 0.100 mol

Part C.

To prepare a solution by dilution, we can use the equation

C1V1 = C2V2

Where C1 is the concentration of the initial (stock) solution, V1 is its volume necessary, C2 is the concentration of the diluted solution, and V2 is its volume.

Thus, C1 = 1.355 M, C2 = 0.05 M, V2 = 2.00 L

1.355V1 = 0.05*2

V1 = 0.074 L

V1 = 74.0 mL

6 0

3 years ago

Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each

SIZIF [17.4K]

They did not repeat their tests multiple times.

Reason being is using the same stopwatch doesn’t matter and changing the reactants won’t help, and you without a doubt need more than one person collecting the data so,

They did not repeat their tests multiple times is the answer.

4 0

2 years ago

Rank the following salts in order of decreasing pH of their 0.1 M aqueous solutions.(a) FeCl2, FeCl3, MgCl2, KClO2 .(b) NH4Br, N

Firlakuza [10]

Answer:

a) FeCl2, FeCl3, MgCl2, KClO2.

KClO2 --> K+ + ClO2-; ClO2- will hydrolyse to form HClO +OH-

Mg+2, Fe+2 and Fe+3 ions will form acidic solutions, since theyfom slightly amount of

Mg+2 + 2H2O <-> Mg(OH)2 + 2H+

Fe+2 + 2H2O <-> Fe(OH)2 + 2H+

Fe+3 + 3H2O <-> Fe(OH)3 + 3H+

Therefore;

decreasing pH is high pH to low pH:

KClO2 > MgCl2 > FeCl2 > FeCl3

b) NH4Br, NaBrO2, NaBr, NaClO2.

NH4Br is acidic, forms NH4+ and NH4+ dnates H+ to form NH3 andH+

NaBrO2 is basic, forms Na+ + BrO2- then H2O + BrO2- HBrO2

NABr is neutral, NaClO2 is basics, forms Na+ + ClO2-then H2O + ClO2- HClO2

decreasig pH:

NaClO2 > NaBrO2 > NaBr >NH4Br

Note that HClO2 is stronger acid than HBrO2, therefore, expectmore HBrO2 formation

NaBrO2 > NaClO2 > NaBr >NH4Br

5 0

3 years ago