Chemical Equation/ Persamaan Kimia

The equation above represents a reaction. What are the reactants in this equation?

Persamaan di atas mewakili satu tindak balas. Apakah bahan-bahan tindak balas dalam persamaan ini?

• Copper(II) nitrate and water

  Kuprum(II) nitrat dan air

• Copper(II) hydroxide and nitric acid

  Kuprum(II) hidroksida dan asid nitrik

• Copper(II) nitrate and nitric acid

  Kuprum(II) nitrat dan asid nitrik

• Copper(II) hydroxide and copper(II) nitrate

  Kuprum(II) hidroksida dan kuprum(II) nitrat

Which chemical equation is correctly balanced?

Persamaan kimia manakah yang diseimbangkan dengan betul?

• K + 0₂ −> K₂0

• K+ Cl₂ −> KCI

• Zn + HCI −> ZnCl₂ + H₂

• Zn + H₂S0₄ −> ZnS0₄ + H₂

The following chemical equation represents the preparation of ammonia gas.

Persamaan kimia berikut mewakili penyediaan gas ammonia.

N₂ + 3H₂ −> 2NH₃

Which of the following is the correct statement?

Antara berikut pernyataan manakah yang betul?

• Two nitrogen molecules react with six hydrogen molecules to produce six ammonia molecules

  Dua molekul nitrogen bertindak balas dengan enam molekul hidrogen untuk menghasi/kan enam molekul Ammonia

• 1.0 g of nitrogen gas reacts with 3.0 g of hydrogen gas to produce 2.0 g of ammonia gas

  1.0 g gas nitrogen bertindak balas dengan 3.0 g gas hidrogen untuk menghasi/kan 2.0 g gas ammonia

• 1 mol of ammonia gas is produced when 0.5 mol of nitrogen gas reacts with 1.5 mol of hydrogen gas

  1 moi gas ammonia dihasilkan apabila 0.5 moi gas nitrogen bertindak balas dengan 1.5 mol gas hidrogen

• Number of atoms in ammonia gas produced is twice the number of atoms in nitrogen gas used

  Bilangan atom dalam gas ammonia terhasil adalah dua kali bilangan atom gas nitrogen yang digunakan

The following equation represents a chemical reaction.

Persamaan berikut mewakili satu tindak balas kimia.

Na₂CO₃ (aq) + CaCl₂(aq) −> CaCO₃(s) + 2NaCl(aq)

Na₂CO₃ (ak) + CaCl₂(ak) −> CaCO₃(p) + 2NaCl(ak)

Which statement is correct?

Penyataan manakah yang betul?

• Two moles of sodium carbonate react with one mole of calcium chloride

  Dua mol natrium karbonat bertindak balas dengan satu mol kalsium klorida

• The products are calcium carbonate precipitate and sodium chloride solution

  Hasil tindak balas ialah mendakan kalsium karbonat dan larutan natrium klorida

• The reactants are solid sodium carbonate and calcium chloride solution

  Bahan tindak balas ialah pepejal natrium karbonat dan larutan kalsium klorida

• Two moles of calcium carbonate and one mole of sodium chloride are formed

  Dua mol kalsium karbonat dan satu mol natrium klorida terbentuk

The decomposition of lead(II) nitrate produces lead(II) oxide, nitrogen dioxide and oxygen.

Which of the following is the balanced chemical equation for the reaction?

Penguraian plumbum(II) nitrat menghasilkan plumbum(II) oksida, nitrogen dioksida dan oksigen. Antara yang

berikut, yang manakah persamaan kimia seimbang bagi tindak balas berikut?

• Pb(N0₃)₂ −> Pb0₂ + 2NO + 0₂

• Pb(N0₃)₂ −> PbO + 2NO + 0₃

• 2Pb(N0_3)₂ −> 2Pb0 + 4N0₂ + 0₂

• 3Pb(N0₃)₂ −> 3Pb0₂ + 6N0₂, + 0₃

The reaction between barium chloride solution and lead(II) nitrate solution produces lead(II) chloride

and barium nitrate. Which ionic equation represents the reaction?

Tindak balas antara larutan barium klorida dan larutan plumbum(II) nitrat menghasilkan plumbum(II) klorida dan

barium nitrat. Persamaan ion yang manakah mewakili tindak balas itu?

• Pb²⁺ + NO₃⁻ −> Pb(NO₃)₂

• Pb²⁺ + 2Cl⁻ −> PbCl₂

• Ba²⁺ + 2Cl⁻ −> BaCl₂

• Ba²⁺ + 2NO₃⁻ −> Ba(NO₃)₂