States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![**Balanced Neutralization Equation Practice**
**Problem:**
Complete the balanced neutralization equation for the reaction below:
$$\text{HCl}(\text{aq}) + \text{Sr(OH)}_2(\text{aq}) \rightarrow$$
**Instructions:**
Use the provided keyboard to input the products of the reaction. Ensure that the equation is balanced.
**Keyboard Layout:**
- **Numbers (0-9):** Allows input of numerical coefficients for balancing.
- **Chemical Symbols (O, Cl, Sr, H):** To input the elements involved in the reaction.
- **States of Matter (s, l, g, aq):** Indicates the physical state of reactants and products.
- **Subscript Inputs:** To correctly input chemical formulas, subscripts are available (for example, "2" for $\text{H}_2\text{O}$).
**Balancing Tips:**
- **Hydrochloric Acid (HCl):** Remember that each molecule contains one hydrogen and one chlorine atom.
- **Strontium Hydroxide [Sr(OH)$_2$]:** Each formula unit contains one strontium, two oxygen, and two hydrogen atoms.
- **Water (H$_2$O):** Often a product in acid-base neutralizations.
- **Strontium Chloride (SrCl$_2$):** Formed when HCl reacts with Sr.
**Example Reaction:**
$$2\text{HCl}(\text{aq}) + \text{Sr(OH)}_2(\text{aq}) \rightarrow \text{SrCl}_2(\text{aq}) + 2\text{H}_2\text{O}(\text{l})$$
**Key Concepts:**
- **Balancing Atoms:** Ensure that the number of atoms for each element is equal on both reactants and products side.
- **Neutralization Reaction:** An acid (HCl) reacts with a base (Sr(OH)$_2$) to form water and a salt (SrCl$_2$).
**Additional Resources:**
- Click on "Tap here or pull up for additional resources" for more detailed explanations on neutralization reactions and balancing equations.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9b712500-b2ac-4dfb-be2f-1c8b439ce3a4%2F9a1a4f14-e20e-4b8a-87b5-7dcbaa40b608%2F42zr3zp_processed.jpeg&w=3840&q=75)
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