C6 Flashcards

What is chemical synthesis?

State 6 main chemicals that are produced from chemical synthesis.

Indicators turn different colours in acids and alkalis. What colour is litmus paper/universal indicator in acids and alkalis?

Pure acids compounds can or solids, liquids, or gases. Give examples of acids that are solid, liquid, or gas when pure.

What is pH a measure of?

On the pH meter, how can you tell whether a substance is neutral, acidic or alkaline?

What do acids react with to form a salt?

What else is usually formed apart from a salt when a metal reacts with an acid?

What is the word equation for the reaction of calcium and hydrochloric acid?

What is formed when an acid reacts with metal oxides and hydroxides?

Salts are ionic compounds. What does this mean?

What is formed when acids react with metal carbonates?

What is the name for the reaction that occurs when an acid and an alkali react?

What is a titration used for?

Why are outliers left out when you calculate the mean?

What is always formed when an acid and an alkali react?

What do all acids contain when dissolved in water?

What do all alkalis contain when dissolved in water?

What are exothermic reactions?

What are endothermic reactions?

What changes as an exothermic reaction occurs, in terms of the energy of the reactants and the products?

What changes as an endothermic reaction takes place, in terms of the energy of the reactants and the products?

What is a pure substance?

Why do some pure substances have to be separated from some impurities in the industry?

What can filtration be used for?

Energy changes in chemical reactions are carefully controlled. Explain why.

Crystallisation is used to purify solid crystals. State the several stages and what happens during it.

What is the difference between theoretical yield and actual yield?

What is the formula to find the percentage yield?

What is the rate of reaction?

Why do chemical engineers look for ways to control reactions?

•What do chemical engineers have to consider when doing this?

What needs to happen for reactions to occur?

How do you increase the rate of the reaction in terms of particles and collisions?

What is a catalyst?

When are reactions faster?

How do chemical engineers control the rate of reaction?