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3 years ago

Explain why the product at the negative electrode is not always a metal.

Chemistry

1 answer:

Elena-2011 [213]3 years ago

3 0

Answer:

Whether you get the metal or hydrogen during electrolysis depends on the position of the metal in the reactivity series: the metal will be produced if it is less reactive than hydrogen. hydrogen will be produced if the metal is more reactive than hydrogen.

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Consider the compound Cu(NO3)2 and answer the following questions.

Mrrafil [7]

1) Name: copper(II) nitrate

2) molar mass:

Determine the mass of every element by multiplying its subscript by the atomic mass and add the masses of all the elements

Element atomic mass subscript total mass of the element
Cu 63.55 1 63.55
N 14.01 2 2*14.01 = 28.02
O 16.00 3*2=6 6*16.00 = 96.00

Molar mass = 63.55 + 28.02 + 96.00 = 187.57 g/mol

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3 years ago

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Sodium permanganate and iron(III) chloride are both dissolved in a beaker of water. In a double displacement reaction, two new p

Nastasia [14]

<u>Answer:</u> The balanced chemical equation is written below.

<u>Explanation:</u>

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

$AB+CD\rightarrow CB+AD$

When sodium permanganate reacts with iron (III) chloride, it leads to the production of sodium chloride and iron (III) permanganate.

The chemical equation for the reaction of sodium permanganate and iron (III) chloride follows:

$3NaMnO_4(aq.)+FeCl_3(aq.)\rightarrow Fe(MnO_4)_3(s)+3NaCl(aq.)$

By Stoichiometry of the reaction:

3 moles of aqueous solution of sodium permanganate reacts with 1 mole of aqueous solution of iron (III) chloride to produce 1 mole of solid iron permanganate and 3 moles of aqueous solution of sodium chloride

Hence, the balanced chemical equation is written above.

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3 years ago

I need help with science pls

Vinvika [58]

Answer: i honestly dont know that is like what 9th grade science im only a 6th grader lol

Explanation: none

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2 years ago

What kind of bond is ca-br

Genrish500 [490]

Answer: Ionic or electrovalent bond

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2 years ago

The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of

CaHeK987 [17]

4 moles of hydrogen = 4 * 1.008 = 4.032 grams

1 mole of helium = 4.003 grams

Difference is 4.032 - 4.003

= 0.029 g

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3 years ago

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