1) Add a catalyst
2) Add heat
3) Stir
4) Mix
5) Surface area of the reactant
Formation of bubbles or gas: Gas evolution can indicate a chemical reaction is occurring. Change in color: A sudden change in color could be a sign of a reaction, such as a shift from clear to cloudy. Temperature change: If the reaction generates heat (exothermic) or absorbs heat (endothermic), it can be an indication that a chemical reaction is taking place.
Bubbles
The reducing agent list for a chemical reaction includes substances that donate electrons to other reactants, causing them to be reduced. Common reducing agents include metals like zinc, magnesium, and aluminum, as well as compounds like hydrogen gas and carbon monoxide.
There are lots of telltale signs, basically any changes that happen to the reaction. For example, this could be a colour change, a mass change as a gas is given off, a pH change, a noise given off, a temperature increase/decrease, fizzing or bubbling.
Because Gold is an extremely unreactive metal, which means that it is not found in any compounds, e.g. Gold Oxide, but is only found on its own. So no chemical reaction is needed to obtain gold. Also, if you look at a metal reactivity series, gold will be at the bottom of the list.
Formation of bubbles or gas: Gas evolution can indicate a chemical reaction is occurring. Change in color: A sudden change in color could be a sign of a reaction, such as a shift from clear to cloudy. Temperature change: If the reaction generates heat (exothermic) or absorbs heat (endothermic), it can be an indication that a chemical reaction is taking place.
the first answer someone provided: placing a reaction mixture in an ultrasonic shaker :) another answer: heating the mixture. another answer: adding a catalyzing agent. Please note that without specifying a LIST of possible actions in your question, it's not really possible for anyone to answer your question as stated. If you ask, "is it 'this', 'that', or 'another thing' ", then people could try to answer the question AS ASKED, by selecting one of the possible answers FROM THE LIST. When you ask 'which', there should be a list to select from, because 'which' generally means 'which of the following' or 'which of the previous'.
Increasing the concentration of reactants can increase the product rate by providing more molecules for the reaction to occur. Additionally, optimizing reaction conditions such as temperature, pH, and pressure can also increase the rate of product formation by favoring the reaction kinetics.
Bubbles
The reducing agent list for a chemical reaction includes substances that donate electrons to other reactants, causing them to be reduced. Common reducing agents include metals like zinc, magnesium, and aluminum, as well as compounds like hydrogen gas and carbon monoxide.
A catalyst alters (usually increases) the speed of a chemical reaction in which there is no net change in the amount of catalyst present after reaction is complete.
The list that indicates which metals are able to displace other metals in a chemical reaction is called the activity series. It ranks metals in order of reactivity, with more reactive metals displacing less reactive metals in aqueous solutions.
An endothermic reaction is any chemical reaction that absorbs heat from its environment. Here's a list of examples of endothermic reactions. You can use these when asked to cite an example or to get ideas to set up a demonstration of an endothermic reaction or process.
There are lots of telltale signs, basically any changes that happen to the reaction. For example, this could be a colour change, a mass change as a gas is given off, a pH change, a noise given off, a temperature increase/decrease, fizzing or bubbling.
Cold water and large pieces.The opposite of catalytic catalysts [that enhance the rate of a specific chemical reaction] are catalytic poisons [that generally halt a particular chemical reaction].An example is the introduction of the auto-exhaust catalytic converter: the catalyst was Palladium which was being poisoned by the Lead in the gasoline so we needed to convert to unleaded gas!Another way of thinking.1-Change of pressure for Reactions having liquid or solid reactants.2-Sound3-Color4-Shape of container.5-Place.
list four possible clues to a chemical change
You did not write any of those chemical names correctly (methane is CH4, not ch4) and all you did was list 4 incorrectly written chemicals, you did not give a chemical equation. Only a chemical reaction can be described as endothermic or exothermic; chemicals by themselves do not have those properties.