Input interpretation
potassium hydroxide + potassium nitrate + chromium(III) oxide ⟶ water + potassium nitrite + K2CrO3
Balanced equation
Balance the chemical equation algebraically: + + ⟶ + + K2CrO3 Add stoichiometric coefficients, c_i, to the reactants and products: c_1 + c_2 + c_3 ⟶ c_4 + c_5 + c_6 K2CrO3 Set the number of atoms in the reactants equal to the number of atoms in the products for H, K, O, N and Cr: H: | c_1 = 2 c_4 K: | c_1 + c_2 = c_5 + 2 c_6 O: | c_1 + 3 c_2 + 3 c_3 = c_4 + 2 c_5 + 3 c_6 N: | c_2 = c_5 Cr: | 2 c_3 = c_6 Since the coefficients are relative quantities and underdetermined, choose a coefficient to set arbitrarily. To keep the coefficients small, the arbitrary value is ordinarily one. For instance, set c_2 = 1 and solve the system of equations for the remaining coefficients: c_1 = 4 c_2 = 1 c_3 = 1 c_4 = 2 c_5 = 1 c_6 = 2 Substitute the coefficients into the chemical reaction to obtain the balanced equation: Answer: | | 4 + + ⟶ 2 + + 2 K2CrO3
Structures
+ + ⟶ + + K2CrO3
Names
potassium hydroxide + potassium nitrate + chromium(III) oxide ⟶ water + potassium nitrite + K2CrO3
Chemical names and formulas
| potassium hydroxide | potassium nitrate | chromium(III) oxide | water | potassium nitrite | K2CrO3 formula | | | | | | K2CrO3 Hill formula | HKO | KNO_3 | Cr_2O_3 | H_2O | KNO_2 | CrK2O3 name | potassium hydroxide | potassium nitrate | chromium(III) oxide | water | potassium nitrite |
Substance properties
| potassium hydroxide | potassium nitrate | chromium(III) oxide | water | potassium nitrite | K2CrO3 molar mass | 56.105 g/mol | 101.1 g/mol | 151.99 g/mol | 18.015 g/mol | 85.103 g/mol | 178.19 g/mol phase | solid (at STP) | solid (at STP) | solid (at STP) | liquid (at STP) | solid (at STP) | melting point | 406 °C | 334 °C | 2435 °C | 0 °C | 350 °C | boiling point | 1327 °C | | 4000 °C | 99.9839 °C | | density | 2.044 g/cm^3 | | 4.8 g/cm^3 | 1 g/cm^3 | 1.915 g/cm^3 | solubility in water | soluble | soluble | insoluble | | | surface tension | | | | 0.0728 N/m | | dynamic viscosity | 0.001 Pa s (at 550 °C) | | | 8.9×10^-4 Pa s (at 25 °C) | | odor | | odorless | | odorless | |
Units
