Amount of substance/acids formulas

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Questions and Answers

What is the formula for density?

d = m imes V

d = rac{V}{m}

d = m + V

d = rac{m}{V} (correct)

Mass concentration can be expressed in g/m³.

False

What is the dilution equation?

C1V1 = C2V2

The formula for solubility is Solubility = Mass / __________.

100cm³ Signup and view all the answers

Match the following quantities with their correct definitions:

Density = Mass per unit volume (g/m²) Mass Concentration = Mass per unit volume (g/dm³) Solubility = Mass per 100 cm³ of solution Dilution Equation = Relation between concentrations and volumes before and after dilution Signup and view all the answers

Which of the following statements about acids is true?

Acids donate protons ($H^{+}$) in solution. Signup and view all the answers

Neutralization reactions produce a salt and water.

True Signup and view all the answers

What term is used to describe salts that contain water molecules as part of their crystalline structure?

hydrated salts Signup and view all the answers

An acid reacting with a metal carbonate produces a salt, water, and ___ .

carbon dioxide Signup and view all the answers

Match the following acids with their properties:

HCl = Strong acid HCOOH = Weak acid HNO3 = Strong acid CH3COOH = Weak acid Signup and view all the answers

What is the correct weight of NaOH to be used for preparing the solution?

1.25 g Signup and view all the answers

To make a standard solution, water is added to the volumetric flask after transferring the NaOH solution.

True Signup and view all the answers

What is the total volume up to which the solution is made in the volumetric flask?

250 cm³ Signup and view all the answers

The formula for percentage uncertainty is % uncertainty = (smallest measurement of equipment / ______) * 100.

total measurement Signup and view all the answers

Match the following steps in the NaOH solution preparation with the correct actions:

Zero Balance = Ensure the scale shows zero before weighing Dissolve NaOH = Mix the NaOH with distilled water Fill to Mark = Add water until reaching the graduation mark Mix Thoroughly = Invert the flask multiple times Signup and view all the answers

What does atom economy represent?

The percentage of atoms in reactants that form the desired product Signup and view all the answers

Atom economy is affected by side reactions.

True Signup and view all the answers

What formula is used to calculate atom economy?

(mass of desired product / mass of all reactants) * 100 Signup and view all the answers

Atom economy is expressed as a percentage and is calculated using the formula: (mass of desired product / mass of all reactants) * ____.

100 Signup and view all the answers

Match the following factors affecting atom economy with their descriptions:

Side reactions = Undesired reactions that consume reactants Reversibility = The extent to which a reaction can proceed in both directions Incompleteness = When not all reactants are converted into products Unit conversion = Changing measurement units from one form to another Signup and view all the answers

What does the empirical formula of a compound represent?

The simplest whole number ratio of atoms Signup and view all the answers

The molecular formula provides the simplest ratio of atoms in a compound.

False Signup and view all the answers

What is a limiting reactant?

The reactant that is completely consumed in a reaction. Signup and view all the answers

The ______ formula gives the actual number of each type of atom in a compound.

molecular Signup and view all the answers

Match the following terms with their definitions:

Empirical Formula = Simplest whole number ratio of atoms Molecular Formula = Actual number of each type of atom in a compound Limiting Reactant = The reactant totally used up in a reaction Product = Substance formed as a result of a chemical reaction Signup and view all the answers

Study Notes

Calculations Involving Density

Density (d) = mass (m) / volume (v)
Units: g/cm³ or kg/m³

Calculations Involving Mass Concentration

Mass concentration = mass (m) / volume (v)
Units: g/dm³ or kg/m³

Calculations Involving Dilution

Equation for dilution: C₁V₁ = C₂V₂
C₁ = initial concentration
V₁ = initial volume
C₂ = final concentration
V₂ = final volume

Unit Conversions

1 atom = 10²³
cm³ → m³ (multiply by 10^-6)
m³ → cm³ (multiply by 10⁶)
Apply powers of 10 appropriately when converting units

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Description

This quiz covers essential calculations involving density, mass concentration, and dilution. You'll practice using formulas and unit conversions essential for understanding these concepts. Test your knowledge and improve your skills in these fundamental areas of chemistry.