Advertisements
Advertisements
प्रश्न
Translate the following statement into a chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.
Advertisements
उत्तर
\[\ce{K_{(s)} + H2O_{(l)} -> KOH_{(aq)} + H2_{(g)}}\]
Balanced equation:
\[\ce{2K_{(s)} + 2H2O_{(l)} -> 2KOH_{(aq)} + H2_{(g)}}\]
APPEARS IN
संबंधित प्रश्न
Balance the following equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
A solution made in water is known as an ______ solution and indicated by the symbol ______.
Carbon monoxide reacts with hydrogen under certain conditions to form methanol (CH3OH). Write a balanced chemical equation for this reaction indicating the physical states of reactants and product as well as the conditions under which this reaction takes place.
Give one example of a chemical reaction characterised by a change in state.
State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle.
A colourless lead salt, when heated, produces a yellow residue and brown fumes.
- Name the lead salt.
- Name the brown fumes.
- Write a chemical equation of the reaction involved.
Write word equation for the following skeletal equation:
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Write word equation for the following skeletal equation:
\[\ce{AgBr -> Ag + Br2}\]
Write your observation for the following chemical reaction and name the product formed :
When ammonium chloride is heated with sodium hydroxide.
Balance the following equation Also name the product formed.
`"K" + "CI"_2 → "KCI"`
Balance the following equation. Also name the product formed.
`"KCIO"_3 → "KCI" +"O"_2`
Balance the following equation. Also name the product formed.
`"Zn" + "HCI" → "ZnCI" _2 + "H"_2`
Balance the following equation. Also name the product formed.
K2O + H2O → KOH
Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of acid required.
Write word equation for the following molecular equation:
CuCo3 → CuO + CO2 [g]
Word equation:
State the characteristics or indications occurring in the above reaction.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Write the word equation for the above molecular equation.
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State why the compound MnO2 is written above the arrow.
Balance the following simple equation:
CaO + HCl → CaCl2 + H2O
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Grams: 42 g + ______ `→` ______ + ______
