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weqwewe [10]
2 years ago
14

When Pb and AlCl3 react together, lead (Pb) can replace aluminum (Al) in the compound because lead is lower on the activity seri

es. T/F
Chemistry
2 answers:
Andre45 [30]2 years ago
8 0
False. Pb is lower than Al in the reactivity series. It cannot replace aluminium in AlCl3
jeka57 [31]2 years ago
3 0

<u>Answer:</u> The correct answer is False.

<u>Explanation:</u>

Single displacement reactions are defined as the reactions in which more reactive element replaces a less reactive element from its chemical reaction.

A+BC\rightarrow AC+B

A is more reactive element than reactive B.

The reactivity of metals is judged by the series known as reactivity series. Elements lying above in the series are more reactive than the elements lying below in the series.

For the reaction between lead and aluminium chloride, the reaction does not take place because lead lies below in the reactivity series than aluminium. Hence, lead cannot displace aluminium from its chemical reaction.

Pb+AlCl_3\rightarrow \text{No reaction}

Hence, the correct answer is False.

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Which group on the periodic table contains elements in all 3 states of matter?
nordsb [41]
VII . A because it contains Br (l), Cl (g) and I (s)
4 0
3 years ago
What is the most likely meaning of concentration in paragraph 7?thinking thinking about about one one thing thing in in a a focu
astraxan [27]

Answer:

amount of a substance found in water.

6 0
3 years ago
Read 2 more answers
A reaction is spontaneous if ΔG is ___?<br> negative, positive, or zero?
amm1812

Answer:

A reaction is spontaneous if ΔG is negative.

Explanation:

  • The change in free energy (ΔG) is the difference between the heat released during a process and the heat released for the same process occurring in a reversible manner.

  • The sign of ΔG gives an indication for the spontaneity of the reaction:

If ΔG is negative, the reaction is spontaneous.

If ΔG = zero, the reaction is at equilibrium.

If ΔG is positive, the reaction is non-spontaneous.

3 0
3 years ago
When potassium metal is placed in water a large amount of energy is released as potassium hydroxide and hydrogen gas are produce
Ann [662]

Explanation:

2K(s)+2H_2O\rightarrow 2KOH(aq)+H_2(g)

The given reaction is redox reaction but not combustion reaction.

Redox reaction : It is a chemical reaction in which oxidation and reduction occurs simultaneously.Oxidation is gaining of electrons and reduction is loosing of electrons.

K\rightarrow K^++e^- oxidation

2H^++2e^-\rightarrow H_2 reduction

Potassium when reacts with water ,gives potassium ion in aqueous medium and combines with hydroxide ion present in water to form potassium hydroxide where as H^+ ions of water by gaining electrons (from potassium in water) gives hydrogen gas.

Hence , yes it is a redox reaction

Combustion reaction are the chemical reaction in which one reactant react with oxygen molecule to give heat and light.

Here in given reaction no oxygen molecule is appearing on reactant side.

Hence not a combustion reaction.

6 0
2 years ago
When a 0. 1 m aqueous solution of hydrocyanic acid, hcn, reaches equilibrium, the ph is measured to be 5. 20. using this informa
Sav [38]

When a 0. 1 m aqueous solution of hydrocyanic acid, HCN, reaches equilibrium, the ka for hydrocyanic acid is  3.969 x 10⁻¹⁰.

<h3>What is ka value?</h3>

It's the value of equilibrium constant for the dissociation of ions into a solution. The more the Ka value the more will be dissociation.

Ka = [H₃O⁺]² / [HCN] [H₃O⁺]

The pH is 5.20

-log [H₃O⁺] = 5.20

Putting antitlog both side.

The value will be 6.30 x 10⁻⁶

Ka = (6.30 x 10⁻⁶)²  / 0.1 - 6.30 x 10⁻⁶

0.1 - 6.30 x 10⁻⁶ = 0.1

Ka = 3.969 x 10⁻¹⁰

Thus, the Ka value for hydrocyanic acid is 3.969 x 10⁻¹⁰.

To learn more about ka value, refer to the link:

brainly.com/question/2796803

#SPJ4

7 0
1 year ago
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