Potassium metal reacts with water to give potassium hydroxide and hydrogen gas

Is the Reaction Exoentropic or Endoentropic? ΔS = S products - S reactants. If ΔS 0, it is endoentropic. K (g) 2 mol 90.03968 J/(mol K) -180.07936 J/K H 2O (g) 2 mol 188.715136 J/(mol K) -377.430272 J/K KOH (s) 2 mol 78.8684 J/(mol K) 157.7368 J/K H 2 (g) 1 mol 130.586824 J/(mol K) 130.586824 J/K ΣΔS°(reactants) 557.509632 J/K ΣΔS°(products) 288.323624 J/K ΔS° rxn -269.186008 J/K Is the Reaction Exergonic or Endergonic? ΔG = G products - G reactants. If ΔG 0, it is endergonic. K (g) 2 mol 60.668 kJ/mol -121.336 kJ H 2O (g) 2 mol -228.588656 kJ/mol 457.177312 kJ KOH (s) 2 mol -379.0704 kJ/mol -758.1408 kJ H 2 (g) 1 mol 0 kJ/mol 0 kJ ΣΔG°(reactants) -335.841312 kJ ΣΔG°(products) -758.1408 kJ ΔG° rxn -422.299488 kJ Instructions To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above. • Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. • Ionic charges are not yet supported and will be ignored. • Replace immutable groups in compounds to avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. • Compound states [like (s) (aq) or (g)] are not required. • You can use parenthesis () or brackets []. Label each compound (reactant or product) in the equation with a variable to represent the unknown coefficients. a K + b H 2O = c KOH + d H 2 • Create ...

let's rank metals from the most reactive to the least reactive for this we will have to do certain experiments and in this video we are going to react metals with water now depending on how vigorously each metal reacts we will list them in this particular series you might recall that in a previous video we attempted add something similar reacted metals with oxygen and depending on how vigorously they reacted we arrived at this particular list here sodium and potassium was most reactive and gold and silver they were the least reactive but there was a problem with this list see over here at rank 3 you can find these four metals being grouped together we weren't able to subber anchor them so our hope for this new experiment is that we will arrive at a more detailed a list more well organized list so let's begin so generally metals when they react with water they displace the hydrogen from water and form metal oxides so here in this case our products are going to be metal oxide plus hydrogen gas being evolved out now we also spoke about some metal oxide being soluble in water this means that if this metal oxide is soluble it will react with water to form metal hydroxide so either our products are metal hydroxide plus hydrogen gas or a suspension of metal oxide in water plus hydrogen gas so ok with this let's look at some examples so first let's react sodium with water so sodium will displace hydrogen that means hydrogen gas will be given out definitely and then sodium will rea...

Translate the following statements into chemical equations and balance them (i) Lead nitrate reacts with sulphuric acid to form a precipitate of lead sulphate and nitric acid. (ii) Magnesium burns in the presence of nitrogen to form magnesium nitride (iii) Aluminium metal strip is added in hydrochloric acid to produce aluminium chloride and hydrogen gas.

Cite this page as follows: "In the following reaction: 2 K + 2 H2O → 2 KOH + H2, if we start with 9.0 grams of H2O, how many moles of H2 will be produced?" eNotes Editorial, 14 June 2012, https://www.enotes.com/homework-help/we-start-with-9-0-grams-h2o-how-many-moles-h2-344313. Accessed 15 June 2023. icon-close Potassium reacts with water to produce potassium hydroxide (KOH) and hydrogen gas (H2) according to the equation: 2 K + 2 H2O --> 2 KOH + H2 Two moles of potassium react with 2 moles of water to form two moles of potassium hydroxide and 1 mole of hydrogen gas. The number of moles of hydrogen gas produced is half the number of moles of water and potassium that react together. The molar mass of water is 18 g/mole. 9 g of water is half a mole of water. If the reaction is conducted with 9 g of water, half of mole of water reacts with half a mole of potassium to produce 1/4 mole of hydrogen. The number of moles of hydrogen gas (H2) produced is 0.25 moles. See eNotes Ad-Free

Hint: Reaction is exothermic, that is energy is released during the reaction, also the resultant solution from the reaction is highly alkaline because of the presence of hydroxide ion, coming from the strong base Potassium hydroxide. Complete step by step answer: Potassium metal reacts very rapidly with water to form a colorless solution of potassium hydroxide (KOH) and hydrogen gas ( $(g)\] All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. This shows that the reactivity of the alkali metals increases as you go down Group 1. Note: Potassium hydroxide (KOH) is an inorganic compound and is commonly known as caustic potash. It is a strong base. Potassium hydroxide is usually translucent pellets which becomes tacky on contact with air, because KOH is hygroscopic.

Balanced chemical equation • Chemical reactions, in which reactants combine to form products, are represented by chemical equations. • Stoichiometric coefficients are added to the reactants and products to balance chemical equations. • It's significant because the principles of mass conservation and constant proportions require a chemical equation to be applied. • When the law of conservation of mass is applied to a chemical, neither an atom is generated nor destroyed on either side of the reaction, resulting in an equal number of elements in both the reactant and the product. Chemical reaction • When Potassium K metal and water H 2 O react, Potassium hydroxide KOH and hydrogen gas H 2 are produced. • The chemical equation is as follows: K ( s ) + H 2 O ( l ) → KOH ( aq )   + H 2 ( g ) Balancing the chemical equation • The number of hydrogen H atoms is 2 on the reactant side but 3 on the product side. • Add 2 in front of K , H 2 O and KOH in order to balance the chemical equation. • The balanced equation is as follows: 2 K ( s )   + 2 H 2 O ( l ) → 2 KOH ( aq ) + H 2 ( g ) Q. Translate the following statements into chemical equations and then balance them. (a) Hydrogen gas combines with nitrogen to form ammonia. (b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide. (c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. (d) Potassium metal reacts with wat er to give potassium hydroxide ...