SS2: Chemistry 1st Term – Mass-Volume Relationships in Reactions

2Na_[s] + 2H₂O_[l]   →  2NaOH_[aq]  + H_2[g]

From the equation above, calculate the mass of sodium hydroxide produced by 2.3 g of sodium. [H = 1, O = 16, Na = 23]

What volume of hydrogen will be produced when 48 g of magnesium reacts completely with dilute hydrochloric acid according to the following equation?

Mg_(s) + 2HCl_(aq) → MgCl_2(aq) + H_2(g)

[Mg = 24, 1 mole of hydrogen occupies 22.4 dm³ at s.t.p]?

Calculate the mass of aluminium which when it is burnt in oxygen will form 0.25 mole of aluminium oxide

4Al_(s) + 30_2(g)  →  2Al₂O_3(s)        

[Al = 27, O = 16]

What is the concentration of a solution containing 2 g of NaOH in 100 cm³ of solution?

[Na = 23, O = 16, H = 1]           

Consider the reaction:        

2CO_(g) + O_2(g)  →  2CO_2(g)                                                                                              

Calculate the volume of excess oxygen gas when 150 cm³ of CO is burnt in 80 cm³ of oxygen      

16.8 g of sodium hydrogentrioxocarbonate(IV) is completely decomposed by heat. Calculate the volume of carbon(IV) oxide given off at s.t.p

[Na = 23, C = 12, O = 16, H = 1, molar volume of a gas at s.t.p = 22.4 dm³]

Consider the reaction represented by the equation;

2NaHCO_3(s) → Na₂CO_{3(s) +} H₂O_(g) + CO_2(g)

What is the mass of sodium trioxocarbonate(IV) produced by the complete decomposition of 33.6 g of sodium hydrogen trioxocarbonate (IV)

[NaHCO₃ = 84; Na₂CO₃ = 106]

How much sodium hydroxide is required to make 250 cm³ of a 0.1 M solution?

[Na = 23, O = 16, H = 1]

2C₂H_2(g) + 5O_2(g) →  4CO_2(g) + 2H₂O_(g)

In the reaction above, the mass of carbon(IV)oxide produced by burning 78 g of ethyne is

[C = 12, O = 16, H = 1]

Consider the reaction represented by the equation;

2NaHCO_3(s) → Na₂CO_3(s) + CO_2(s) + H₂O_(g)               

What is the volume of carbon(IV) oxide at s.t.p is evolved when 0.5 mole of NaHCO₃ is heated?

[molar volume = 22.4dm³ at s.t.p]