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4 years ago

An acid-base reaction will always produce water and which one of the

Chemistry

1 answer:

Nonamiya [84]4 years ago

8 0

Answer: Option D) Salt

Explanation:

An example of acid-base reaction is

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

Acid + base → Salt + Water.

Here, water H2O and salt, NaCl are produced.

Usually, the acid, aqeous HCl reacts completely with an appropriate amount of the base, aqueous NaOH to produce salt, aqueous NaCl and water, liquid H2O only, in a process also known as neutralization reaction

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A sample that is 74.5 percent chloride by mass is dissolved in water and treated with an excess of

12345 [234]

Answer:

Total mass of original sample = 0.38 g

Explanation:

Percentage of chloride = 74.5%

Mass of AgCl precipitate = 1.115 g

Mass of original sample = ?

Solution:

Mass of chloride:

1.115 g/ 143.3 g/mol × 35.5 g/mol

0.0078 g × 35.5 = 0.28 g

Total mass of compound:

Total mass = mass of chloride / %of Cl × 100%

Total mass = 0.28 g/ 74.5% × 100%

Total mass = 0.0038 g× 100

Total mass = 0.38 g

5 0

3 years ago

In which group of the Periodic Table do most of the elements exhibit both positive and negative oxidation states?

Shtirlitz [24]

C i think but you should pick it anyway

4 0

3 years ago

Write the balanced chemical equation for the following reaction. Phases are optional. Solid calcium chlorate decomposes to form

Tanya [424]

Answer:

Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)

Explanation:

1) Word equation (given)

calcium chlorate (solid) → solid calcium chloride (solid) + oxygen (gas)

2) Chemical formulae of the reactant and products:

Calcium chlorate:

The most common oxidation states of chlorine are -1, +1, +3, +5, +7.

The suffix ate in chlorate means that chlorine atom is with the third lowest oxidation state (counting only the positive states). So, this is +5.

The oxidation state of calcium is +2.

Hence, the chemical formula of calcium chlorate is Ca(ClO₃)₂

Calcium chloride

The suffix ide in chloride means that chlorine is with oxidation state -1. Again the oxidation state of calcium is +2.

Hence, the chemical formula of calcium chloride is CaCl₂

Oxygen

Oxygen gas is a diatomic molecule, so its chemical formula is O₂.

Phases

The symbols s and g (in parenthesis) indicate the solid and gas phases respectively.

3) Chemical equation:

Ca(ClO₃)₂ (s) → CaCl₂ (s) + O₂ (g)

That equation is not balanced becasue the number of O atoms in the reactant side and in the product side are different.

4) Balanced chemical equation:

Add a 3 as coefficient in front of O₂(g), in the product side to balance:

Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)

Verify that all the atoms are balanced:

Atom Reactant side Product side

Ca 1 1

Cl 2 2

O 3×2 = 6 2×3 = 6

Conclusion: the equation is balanced and the final answer is:

Ca(ClO₃)₂ (s) → CaCl₂ (s) + 3O₂ (g)

5 0

4 years ago

Which of the following is not among the advantages of generating nuclear energy?

WARRIOR [948]

While nuclear energy does not pollute the environment, it poses the risk of radiation which is harmful to organisms because it causes lethal mutations.

Explanation:

Nuclear fission, for example, releases neutrons and other particles (at very high speeds) that can ionize materials including DNA. This will induce mutations of DNA most of which are usually lethal to organisms. Gamma and X- rays are also produced by fusion reactions and if exposed to organisms also cause mutations on DNA through double stranded breaks. Therefore, the risk of an accident of a nuclear reactor can have immense ramifications on the ecosystems.

Learn More:

For merits and demerits of nuclear energy check out;

brainly.com/question/1161965

brainly.com/question/3760263

brainly.com/question/8608522

#LearnWithBrainly

7 0

3 years ago

A race car moves at a constant speed around an oval track is the car accelerating why or why not

Inga [223]

The car is not accelerating in terms of speed
however it is accelerating in terms of velocity as velocity has a directional component and the direction is changing

4 0

4 years ago