Total Mass = Total Mass 1(24.3) (35.5) ( ) 95.3 g = gīalancing Equations hydrogen + oxygen water H2 + O H2O FORMULAS MUST BE CORRECT! FORMULAS CANNOT BE CHANGED when you start balancing This makes the equation BALANCED!ĩ Matter Is Conserved Mg + Cl2 MgCl2 Total atoms = Total atoms The number of atoms of each type of element must be the same on each side of the equation. In a chemical reaction, the amount of reactants equal the amount of products.Ĩ It’s the Law! How it applies to us now: Law of Conservation of Atoms – In a chemical reaction, matter can be neither created nor destroyed. ZnS(s) + O2(g) ZnO(s) + SO2(g) KClO3 (s) KCl(s) + O2(g)ħ The Law Says… Law of Conservation of Matter: Aqueous sodium hydroxide combines with aqueous copper(II) nitrate to form aqueous sodium nitrate and solid copper(II) hydroxide. Iron metal combines with oxygen gas in the presence of water to produce solid iron(III) oxide. REACTANTS PRODUCTS Multiple reactants and products are separated from each other by + signs Reactants are separated from products by a yield sign () Other notations include Δ, ↔, s, l, g, aq Indicators of a chemical reaction include: Energy change (gain or loss of heat) Gas production (bubbles or odor) Precipitate production (liquids make a solid) Color change Water productionģ Chemical Equations REACTANTS PRODUCTSĪ chemical reaction is represented in writing by a chemical equation. Plan and carry out an investigation to determine that a new chemical has been formed by identifying indicators of a chemical reaction (e.g., precipitate formation, gas evolution, color change, water production, and changes in energy to the system).Ģ Chemical Reaction A chemical reaction occurs when one or more substances change into one or more new substances. Use mathematics and computational thinking to balance chemical reactions (i.e., synthesis, decomposition, single replacement, double replacement, and combustion) and construct an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties. Obtain, evaluate and communicate information about how the Law of Conservation of Matter is used to determine chemical composition in compounds and chemical reactions.
Obtain, evaluate and communicate information about how the Law of Conservation of Matter is used to determine chemical composition."- Presentation transcript:ġ Chemical Reactions SC2. Presentation on theme: "Chemical Reactions SC2.
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