A salt is obtained as a reaction between .A. a base and water.
B. a nonmetal and a metal.
C. an acid and oxygen.
D. a base and an acid.
Answers
A salt is obtained as a reaction between a base and an acid which is option D.
A salt is obtained as a reaction between a base and an acid. In this reaction, the base donates a hydroxide ion (OH⁻) and the acid donates a hydrogen ion (H⁺). The hydroxide ion and hydrogen ion combine to form water (H₂O), and the remaining ions from the base and acid combine to form the salt. The salt is typically composed of a metal cation from the base and a non-metal anion from the acid. The formation of salt is a neutralization reaction where the acidic and basic properties of the reactants are neutralized, resulting in the formation of a new compound, the salt.
Hence, the correct option is option d.
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(2) Pb(CrO4)2 (4) Pb2(CrO4)3
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Lead chromate and lead sulfate are found in the crystal Pb(Cr, S)O₄, which is a changeable solid mixed phase. This material is the end product of a co-precipitation reaction between lead and chrome salts (see the chapter on production and usage for further information). The correct option is 1.
Water does not dissolve lead chromate, which is produced by the double decomposition process. It is also used as a pigment and is referred to as chrome yellow. In a media that has been buffered with a solution of acetic acid and lead acetate, the lead precipitates as chrome.
There may be significant amounts of water-soluble lead compounds in lead chromate pigments. The formula that represents Lead (II) Chromate is PbCrO₄.
Thus the correct option is 1.
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Answers
106 g Na₂CO₃ -------- 2 x 36.5 g HCl
x g Na₂CO₃ ---------- 750 g HCl
Mass of Na₂CO₃ = 750 x 106 / 2 x 36.5
Mass ( Na₂CO₃) = 79500 / 73
Mass = 1089.04 g
Number of moles = 1089.04 / 106 => 10.27 mols of Na₂CO₃
hope this helps!
Final answer:
To fully react with 750 g of HCl (approximately 20.5 moles), a minimum of 10.25 moles of sodium carbonate is needed.
Explanation:
To calculate the minimum amount of sodium carbonate needed to react fully with 750 g of HCl, we need to start by converting the 750 g of HCl to moles. The molecular weight of HCl is about 36.5 g/mol, so 750 g is about 20.5 mol of HCl. Looking at the reaction equation Na2CO3 + 2HCl → 2NaCl + CO2 + H2O, you can see that you need one mole of sodium carbonate to react with two moles of HCl. Therefore, to fully react with 20.5 mol of HCl, you will need a minimum of 10.25 mol of sodium carbonate.
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Answers
Answer : The volume of concentrated hydrochloric acid is, 0.25 liters
Explanation :
Using neutralization law,
where,
= molarity of concentrated hydrochloric acid = 12 M = 12 mole/L
= molarity of hydrochloric acid = 6 M = 6 mole/L
= volume of concentrated hydrochloric acid = ?
= volume of hydrochloric acid = 500 ml = 0.5 L
Now put all the given values in the above formula, we get the volume of concentrated hydrochloric acid.
Therefore, the volume of concentrated hydrochloric acid is, 0.25 liters
12.0 * V₁ = 6.0 * 500.0
12.0 V₁ = 3000
V₁ = 3000 / 12.0
V₁ = 250 mL
hope this helps!
by a lowercase letter. This tells you the types of elements in the compound.
Answers
Answer:
Elements
Explanation:
The elements which are represented by a single uppercase letter, or represented by an uppercase letter followed by a lowercase letter. This tells you the types of elements in the compound.
Elements are one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means. They are made up of small indivisible particles called atoms, all having the same number of protons.
Final answer:
Chemical symbols which can be single uppercase or one uppercase followed by a lowercase letter, are used in Chemistry to represent elements. They are used in the composition of compounds. For example, 'H' for Hydrogen and 'Ca' for Calcium.
Explanation:
In Chemistry, elements are represented by one or two letters. The first letter is always uppercase and the second letter, if present, is lowercase. These are known as chemical symbols and they correspond to the elements in the Periodic Table. For instance, the symbol for Hydrogen is H, and for Calcium it's Ca. These symbols are used to denote elements in chemical compounds. For example, water (H2O) is a compound consisting of Hydrogen and Oxygen.
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