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Fofino [41]
3 years ago
13

What effects does the concentration of reactants have on the rate of a reaction ?

Chemistry
1 answer:
Harlamova29_29 [7]3 years ago
5 0

Question:

<em>What effects does the concentration of reactants have on the rate of a reaction?</em>

Answer:

<em>Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. This occurs because a higher concentration of a reactant will lead to more collisions of that reactant in a specific time period.</em>

<em>Increasing the concentration of reactants generally increases the rate of reaction because more of the reacting molecules or ions are present to form the reaction products. ... When concentrations are already high, a limit is often reached where increasing the concentration has little effect on the rate of reaction.</em>

Hope this helps, have a good day. c;


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4 years ago
A certain substance X has a normal freezing point of 5.6 °C and a molal freezing point depression constant Kf-7.78 °C-kg·mol-1.
Harrizon [31]

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27.60 g urea

Explanation:

The <em>freezing-point depression</em> is expressed by the formula:

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In this case,

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  • Kf = 7.78 °C kg·mol⁻¹

m is the molality of the urea solution in X (mol urea/kg of X)

First we<u> calculate the molality</u>:

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Now we<u> calculate the moles of ure</u>a that were dissolved:

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