Chemistry Chapter 5 Quiz

Anhydrous Copper Sulfate is a white powder that changes color when water is added to it, turning blue.

When water is added to anhydrous copper sulfate, the compound changes color from white to blue. This indicates that a chemical reaction has occurred.

Hydrated Copper Sulfate is the blue form of copper sulfate that contains water molecules.

A reversible reaction is a chemical reaction that can proceed in both directions. The products can react to form the reactants again.

The word equation uses double arrows (⇌) to show that the reaction can proceed in both directions, meaning it is reversible.

CuSO4 is the chemical formula for anhydrous copper sulfate.

The formula CuSO4 has 1 copper atom (Cu), 1 sulfur atom (S), and 4 oxygen atoms (O). In total, it has 6 atoms.

To test for chlorine gas, use damp blue litmus paper. Chlorine gas will bleach the blue litmus paper, turning it white.

A mixture specifically created to be used for a particular purpose, like printer ink.

A technique used to separate different components of a mixture based on their different affinities to a stationary phase and a mobile phase.

The distance travelled by a component from the start line divided by the distance travelled by the solvent from the start line.

A pencil is used to draw the start line in chromatography because the graphite in the pencil does not dissolve in the mobile phase, so it won't interfere with the chromatography process.

A ruler is used to measure the distances between the start line, the solvent front, and the individual components of a mixture in chromatography. This ensures accurate measurements for calculating the Rf values.

A colorless, odorless gas that is a major component of the Earth's atmosphere.

A process that uses electricity to break down a substance into its elements.

A process that separates solids from liquids using a porous material.

A form of oxygen that is a powerful oxidizer and has a pungent odor.

A type of electromagnetic radiation with wavelengths shorter than visible light.

A container designed for measuring the volume of liquids.

The amount of dissolved solids in a sample of water.

The mass of the dissolved solids in a sample of water.

Increasing temperature increases the rate of a reaction because particles move faster, collide more frequently, and with more energy, leading to a greater number of successful collisions.

A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

Catalysts in biological systems are called enzymes.

The variables used in the investigation are the independent variable, which is the factor being changed, and the dependent variable, which is the factor being measured.

The independent variable is the factor being changed in the investigation, which is the type of ion. The dependent variable is the factor being measured, which is the mass of ions dissolved in 1 dm3 of seawater.

A bar chart is a type of graph that uses bars to represent data. The height of each bar represents the value of the data point. The x-axis represents the different types of ions, and the y-axis represents the mass of ions dissolved in 1 dm3 of seawater.

The scale on the y-axis should range from 0 to 10, in increments of 1. The data from Table 4 should be plotted as bars on the chart, with the height of each bar representing the mass of the corresponding ion.

A Life Cycle Assessment (LCA) is a comprehensive assessment of the environmental impacts of a product throughout its lifecycle.

LCAs are used to evaluate the environmental impact of different products from their raw material extraction to final disposal. They consider various factors such as energy consumption, greenhouse gas emissions, and water usage.

LCAs help businesses identify areas where they can reduce their environmental footprint by making changes to their product design, manufacturing processes, or packaging.

68.0% of the 212 million kg of aluminium packaging used in the UK each year is recycled.

The mass of aluminium recycled is calculated by multiplying the total mass of aluminium packaging used by the percentage of aluminium packaging recycled. In this case, 212 million kg * 0.68 = 144.16 million kg.

To find the number of cans, divide the total mass of aluminium by the mass of one can.

4.00 kg of aluminium is equal to 4000 g. Dividing 4000 g by 15.8 g/can gives approximately 253 cans.

Recycling wood and steel is sustainable as it reduces waste and conserves resources.

Using wood as waste is less sustainable than recycling or burning it, as it contributes to landfill and resource depletion.

Using steel as waste is less sustainable than recycling, as it contributes to landfill and resource depletion.

Burning wood is more sustainable than using it as waste, as it provides energy and avoids landfill.