When sodium metal is placed in water, the following change occurs: Sodium, Na(s) + Water, H 2 O(l) → Hydrogen, H 2 (g) + Sodium hydroxide, NaOH(aq) a. Identify the reactants and products and their physical states

Welcome back everyone in an experiment involving the study of re activities of group one a elements with water. A small piece of potassium metal is added to water, identify the reactant and products along with their physical states. From the following observed chemical equation, the chemical equation reads that we have two moles of K potassium in solid form reacting with two moles of water, H 20 in liquid form to produce two moles of K O H potassium hydroxide, which is Aquarius or soluble and H sub two for hydrogen gas. So for our reactant, we have solid potassium represented by its chemical symbol as K and we have our solid potassium which we have two moles of to be specific reacting with two moles of water represented by its chemical symbol or rather chemical formula H 20 and it's given in liquid form. And as far as our products after our reaction arrow, we have our product potassium hydroxide given by its formula K O H and were given the symbol A Q and parentheses which tells us that potassium hydroxide is soluble in water. So it's Aquarius and we have two moles of K O H produced. Our second product is going to be our di atomic gas hydrogen given by its chemical formula H sub two. And again, it's in its gaseous state. So it gets the simple G in parentheses. So to fill in our physical state for hydrogen, we would say gaseous hydrogen. For R K O H, we have Aquarius potassium hydroxide. And then going back to our reacting side, we have liquid water. And so our final answers are going to be our reactant. We would highlight K for potassium, we can highlight that it's solid. We have H20 for water in its liquid form. And then on our product side, we have our K O H for potassium hydroxide, which is Aquarius and hydrogen in gaseous form. And so everything highlighted in yellow represents our reactant and products along with their physical states from our observed chemical equation. This will correspond to choice be in the multiple choice as the correct answer. So I hope this made sense and let us know if you have any questions.

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5. Classification & Balancing of Chemical Reactions

Chemical Reaction: Chemical Change

GOB Chemistry

5. Classification & Balancing of Chemical Reactions

Chemical Reaction: Chemical Change

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2:53 minutes

Problem 44a

Textbook Question

When sodium metal is placed in water, the following change occurs: Sodium, Na(s) + Water, H₂O(l) → Hydrogen, H₂(g) + Sodium hydroxide, NaOH(aq)
a. Identify the reactants and products and their physical states

Verified step by step guidance

Step 1: Identify the reactants in the given chemical equation. Reactants are the substances present on the left side of the arrow. In this case, the reactants are sodium (Na) and water (H₂O).

Step 2: Identify the physical states of the reactants. Sodium (Na) is a solid, denoted as (s), and water (H₂O) is a liquid, denoted as (l).

Step 3: Identify the products in the given chemical equation. Products are the substances present on the right side of the arrow. In this case, the products are hydrogen gas (H₂) and sodium hydroxide (NaOH).

Step 4: Identify the physical states of the products. Hydrogen (H₂) is a gas, denoted as (g), and sodium hydroxide (NaOH) is an aqueous solution, denoted as (aq).

Step 5: Summarize the reactants and products with their physical states: Reactants: Sodium (Na (s)) and Water (H₂O (l)); Products: Hydrogen (H₂ (g)) and Sodium hydroxide (NaOH (aq)).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Reactants and Products

In a chemical reaction, reactants are the starting substances that undergo a change, while products are the substances formed as a result of the reaction. In the given equation, sodium (Na) and water (H2O) are the reactants, and hydrogen gas (H2) and sodium hydroxide (NaOH) are the products.

Physical States

The physical state of a substance indicates its form at a given temperature and pressure, typically categorized as solid (s), liquid (l), gas (g), or aqueous (aq). In the reaction, sodium is a solid (s), water is a liquid (l), hydrogen is a gas (g), and sodium hydroxide is in an aqueous solution (aq).

Chemical Equation

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants on the left and the products on the right, separated by an arrow. It conveys the conservation of mass, indicating that the number of atoms of each element is the same before and after the reaction, which is essential for balancing the equation.

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