Chemistry Methods and Techniques Quiz

<p>$100^\circ C$ (B)</p> Signup and view all the answers

<p>To mark the starting point of the sample. (D)</p> Signup and view all the answers

<p>Pencil will not affect the results. (A)</p> Signup and view all the answers

<p>The ratio of the distance moved by the sample to the distance moved by the solvent front. (A)</p> Signup and view all the answers

<p>The line where the solvent stops moving. (B)</p> Signup and view all the answers

<p>The volume of gas produced. (A)</p> Signup and view all the answers

<p>To increase the surface area for reaction. (B)</p> Signup and view all the answers

<p>To prevent loss of metal oxide smoke. (C)</p> Signup and view all the answers

<p>To ensure complete reaction. (D)</p> Signup and view all the answers

<p>Mass of the metal oxide – mass of the metal (C)</p> Signup and view all the answers

<p>The solid metal oxide stops dissolving or reacting. (B)</p> Signup and view all the answers

<p>The volume of acid needed would increase. (A)</p> Signup and view all the answers

<p>It would have no effect on the amounts of reactants needed for neutralization. (D)</p> Signup and view all the answers

<p>By filtration. (A)</p> Signup and view all the answers

<p>Heating or warming of the reaction mixture would likely not be necessary. (A)</p> Signup and view all the answers

<p>Silvery grey (A)</p> Signup and view all the answers

<p>Violet (B)</p> Signup and view all the answers

<p>Brown (A)</p> Signup and view all the answers

<p>To separate the unreacted insoluble base from the salt solution. (A)</p> Signup and view all the answers

<p>To ensure all acid reacts to form the salt. (D)</p> Signup and view all the answers

<p>To reach the point where crystals will start to form. (C)</p> Signup and view all the answers

<p>To remove remaining water. (B)</p> Signup and view all the answers

<p>For higher accuracy by ensuring no contamination exists from the indicator. (D)</p> Signup and view all the answers

<p>A colour change in the indicator. (D)</p> Signup and view all the answers

<p>The relative concentration of the solution. (A)</p> Signup and view all the answers

<p>To remove any soluble impurities (B)</p> Signup and view all the answers

<p>Metal hydroxide and hydrogen (A)</p> Signup and view all the answers

<p>Bubbles of hydrogen gas form (A)</p> Signup and view all the answers

<p>White solid (A)</p> Signup and view all the answers

<p>To condense and cool down steam (C)</p> Signup and view all the answers

<p>Copper and water (C)</p> Signup and view all the answers

<p>The reaction rate decreases. (B)</p> Signup and view all the answers

<p>Color of the reactants (B)</p> Signup and view all the answers

<p>Higher rate of reaction. (B)</p> Signup and view all the answers

<p>The reaction is considered complete. (C)</p> Signup and view all the answers

<p>Stirring helps to evenly distribute reactants, increasing the rate. (D)</p> Signup and view all the answers

Metals react to form hydroxides and hydrogen gas when exposed to cold water.

2 K + 2 H2O ➔ 2 KOH + H2 shows potassium reacting with water.

Zinc and iron react with steam to produce metal oxides and hydrogen gas.

Metals react with oxygen to produce metal oxides.

CuO + H2 ➔ Cu + H2O reduces copper oxide to copper metal.

The speed at which reactants turn into products in a chemical reaction.

Conditions like temperature, pressure, concentration, surface area, stirring, catalyst, and light that influence how fast a reaction occurs.

Indicates a higher rate of reaction due to a rapid change in concentration of reactants.

The reactant that is completely used up first, stopping the reaction.

Shows higher concentration or mass of the limiting factor in a reaction graph.

A tool used to separate two immiscible liquids, such as water and oil.

Stop heating when crystals appear on the glass rod or edges of the container.

A solution containing more solute than solvent, meaning less water is present.

The process of pouring off a liquid to leave solid behind.

A technique used to separate dissolved solids like colors or amino acids.

A pencil line drawn on chromatography paper to start the separation process.

A value that indicates the distance a substance moves relative to the solvent front.

Add solid to a solution; if no more dissolves and solid remains, the solution is saturated.

The process of creating salts using acids and insoluble bases.

The method of forming solid crystals from a solution through cooling and evaporation.

A technique to separate unreacted insoluble base from the solution after making salts.

A quantitative chemical analysis method to determine concentration of a solution by adding a reactant until the reaction reaches its endpoint.

The point in titration when the indicator changes color indicating the completion of the reaction.

An indicator used in titrations that changes color at a specific pH level.

Determining which solution has a higher concentration by comparing how much acid is needed to neutralize it.

The process of rinsing the formed crystals with distilled water to remove impurities.

Heating copper carbonate produces copper oxide and carbon dioxide gas.

Measure the volume of gas produced during metal carbonate decomposition.

Repeat gas measurement experiment using calcium carbonate instead of copper carbonate.

Determine maximum mass of oxygen reacting with metal to form metal oxide.

Crushing increases surface area for improved reaction efficiency.

The reaction between an acid and a base producing water and a salt.

A sign that all acid has reacted in neutralization, indicated by metal oxide stopping dissolution.

Increases the volume of acid needed in a titration process.

Does not affect the amount of acid needed in titration.

Excess unreacted metal oxide can be removed by filtration.

Using zinc carbonate does not require heating to produce zinc chloride.

Carbon (Black), Sulphur (Yellow), Boron (White) are colors at room temperature.

Noble gases, including Helium and Neon, are colorless gas at room temperature.