Contents

- 1 What does X represent in an ice table?
- 2 When can you neglect x in equilibrium?
- 3 How do you solve for x in an ice table?
- 4 What is the 5% rule in chemistry?
- 5 Can you use ice tables for pressure?
- 6 When can you use X is small?
- 7 How do you know when to use an ice table?
- 8 What is the 100 rule in chemistry?
- 9 What is ice chart?
- 10 Do you include solids in ice tables?
- 11 What is a reaction table?
- 12 What is the 5 rule in money?
- 13 How do I calculate pH?
- 14 How do you know if Y intercept is negligible?

## What does X represent in an ice table?

Let “**x**” **represent** the change in concentration of the oxygen gas. Since only NO and O_{2} are present, the reaction must proceed to the left in order to establish equilibrium. The O_{2} gas **will** decrease in concentration over time.

## When can you neglect x in equilibrium?

Recall that a small K_{c} means that very little of the reactants form products and a large K_{c} means that most of the reactants form products. **If** the system **can** be arranged so it starts “close” to **equilibrium**, then **if** the change (**x**) is small compared to any initial concentrations, it **can** be **neglected**.

## How do you solve for x in an ice table?

The **x** value can be used to calculate the equilibrium concentrations of each product and reactant by plugging it into the elements in the E row of the **ice table**. [Solution: **x** = 0.0416, -0.0576. **x** = 0.0416 makes chemical sense and is therefore the correct answer.]

## What is the 5% rule in chemistry?

Re: 5% rule

So you find your x **value** through the approximation method then divide by your initial amount of weak acid or base and multiply by 100. If the number calculated is greater than 5 then the quadratic formula should be used to solve for x. (x/[HA]) x 100 = some percent.

## Can you use ice tables for pressure?

Yes **you can use pressure** in an **ice table**!

## When can you use X is small?

**Use** the 5% rule by starting with the approximation and calculating **x**. Then, decide **if** the approximation is valid. **If** is **smaller** than 5%, then the approximation is valid.

## How do you know when to use an ice table?

Key words I look for to **know when to use an ICE table** are “determine molar concentrations in the mixture at equilibrium,” “__ was placed into the reaction vessel,” “initial,” and “equilibrium concentrations.” Make sure that whatever variable you **use** to denote a change in the equation is proportional.

## What is the 100 rule in chemistry?

Although there is no explicit **rule**, for most practical purposes you can say that equilibrium constants within the range of roughly 0.01 to **100** indicate that a chemically significant amount of all components of the reaction system will be present in an equilibrium mixture and that the reaction will be incomplete or “

## What is ice chart?

**Ice** and iceberg **charts** serve tactical (day-to-day) or strategic (longer-term) planning and operational purposes. They illustrate **ice** or iceberg conditions at a particular moment in time. The **ice** information is presented using a standard international code, known as the Egg Code.

## Do you include solids in ice tables?

No **you do** not **include** the concentration of **solids** and liquids when calculating the equilibrium constant. So in this case, in the **ice table you should** only **include** the concentrations of H2 and AsH3.

## What is a reaction table?

The **Reaction** column lists either a **reaction** (or flux) that can be edited in place, or “**Reaction** Rule” text that cannot be edited. Structure lists the structure where the **reaction**, flux or **reaction** rule occurs. Depiction shows the molecular details of the reactants and products.

## What is the 5 rule in money?

How about this instead—the 50/15/**5 rule**? It’s our simple **rule** of thumb for saving and spending: Aim to allocate no more than 50% of take-home pay to essential expenses, save 15% of pretax income for retirement savings, and keep **5**% of take-home pay for short-term savings.

## How do I calculate pH?

To **calculate** the **pH** of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The **pH** is then calculated using the expression: **pH** = – log [H_{3}O^{+}].

## How do you know if Y intercept is negligible?

- Rule:
**if intercept**is less than or = 5% of max**Y**value, the**intercept is negligible**and**you**may drop it from the equation; **if intercept**is greater than 5% of max**Y**value, it is significant and**you**must keep it as part of the final equation.