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# How would you Calculate the H3O ion concentration in a solution with pH3 and a solution with pH8?

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# What is the concentration of silver ions in a solution of silver iodate?

It depends on how much you've put into solution. But all concentrations are equal in moles: AgIO3 : Ag+ : IO3- = 1:1:1

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# What is the pH of an aqueous solution with the hydronium ion concentration H3O 2 x 10-14 M?

To find the pH use this: -log(2 X 10^-14 M) = 13. 7 pH ( you could call it 14 )

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# What are the relative numbers of H3O and OH- ions in an acidic an alkaline and a neutral solution?

Neutral- Equal Alkaline- More OH than H30 Acidic- The h30 is greater than the oh

# Where Can I Find a Quilting Calculator?

You have a pattern for a quilt block you like. Now you have to calculate how much of each fabric is used in the block and multiply it by the number of blocks you need for the …quilt top. Then there are the borders to consider, not to mention how much fabric you will need for the batting, backing and binding for the quilt. Quilting requires lots of math calculations. Thankfully, there are a number of wonderful quilting calculators available that can make these complicated calculations for you in seconds.[Quilter's Paradise](http://www.quiltersparadiseesc.com/Calculators.php) offers a calculator that will make a number of different calculations for you, and it's free. It will calculate how much fabric is needed if you want to cut a given number of fixed-sized pieces, how much fabric will be needed for each border, as well as calculations for batting, backing and binding. It will also provide measurement conversions. This calculator does it all.[The Quilter's Little Helper](https://itunes.apple.com/us/app/quiltingcalc/id390366459?mt=8) is a free iTunes App for smart phones and iPads. This App is extremely handy as it lets you do the calculations while you are on the go. If you are in the quilt shop and need to figure out the amount of yardage you need to buy, you will have the tool to do it.The [Quiltshops](http://search.quiltshops.com/calculator/calculator.htm) website offers a basic calculator that allows you to enter the width and height of your block, as well as the percentages of light, medium and dark fabrics you wish to use, and it will calculate how much yardage of each fabric you will need. This is a little more basic that the previously mentioned calculators, but still very useful.The [Vrya](http://vrya.net/quilt/) website offers two versions of their calculator, which you can use for free online. You are also able to purchase a version for off-line use for $3.50, which is very affordable. This is a nice option if you want to make the conversions without needing to go online. The classic calculator offers yardage estimates based on the shapes used in each block: squares, triangles, half-square triangles, half-rectangle triangles, quarter-square triangles, trapezoids, and parallelograms. The flash calculator makes the same calculations, but you can simply click on the shapes you want to use, enter the number needed and it instantly makes the yardage calculation for you.This website claims to be the oldest and most accurate calculator on the internet. [Calculate for Free]() is a basic, no-frills calculator but it offers straight-forward descriptions of calculations available and it is quick and easy to use. Interestingly, beyond the block, border, batting, backing and binding calculations, it also offers a cross-stitch calculator that is not offered by other sites.If you would prefer a more portable method of calculation, you might consider the [Quilter's FabriCalc](), a hand-held calculator. Not only does it perform all of the functions provided by the internet calculators, it also offers the ability to do a reverse calculation to find the number of shapes that can be cut from a piece of fabric, will calculate the cost of the yardage, and will store fabric yardage solutions for six individual types of fabric. The $22.00 price tag seems worth the money.Although these calculators claim to be very accurate in their yardage estimates, it would be a good idea to round up to the nearest quarter-yard in your fabric purchase, to allow for a slightly inaccurate estimate.These easy-to-use calculators eliminate the need for pencil and paper calculations and provide yardage estimates that makes it possible to buy all the fabric you will need for your project without the fear of running out of a particular fabric part way through the project. Put these calculators in your quilting tool box. (MORE)

# Eight Types of Win-Win Solutions

Even with zero arguing, problem-solving can still be difficult. Here are eight frameworks for possible win-win solutions that can help you resolve the conflicts in your marria…ge. (MORE)

# 3 naturally occurring pH indicators

pH indicators are an important tool in chemistry. They help determine the pH of solutions. This article describes 3 naturally occurring pH indicators.… (MORE)

# Net Price Calculators: Helping Families Determine the Cost of College

Families should approach the college admissions process armed with as much information as possible so they can avoid financial hardship in the future. Colleges must include a …net price calculator on their websites to help prospective students and their families determine the actual cost. (MORE)

# Guidelines for Using a Calculator on the PSAT

Every October, high school students have the opportunity to take the PSAT. For some students, this exam is a way to practice for the SAT. For high-scoring students, the PSAT… offers the opportunity to qualify for National Merit Scholarships. Because all test-takers will be hoping to do their best, it is important that they understand the guidelines for using calculators while taking the PSAT. Knowing when the calculator is allowed during the test will help students earn their top scores on the PSAT math section.Students are strongly encouraged to bring and use calculators on the PSAT, and scientific or graphing calculators are recommended. The PSAT includes 38 math questions covering topics such as algebra, geometry, statistics, functions, and probability. Students will find that many questions with are easier and quicker to solve with the aid of a calculator.While calculators are strongly encouraged by the PSAT, they are not provided for test-takers. Some schools may offer calculators for use during the test as a courtesy, but students should plan to bring their own calculator to the PSAT. There's also an advantage to bringing one's own calculator: It will be a familiar calculator the student is comfortable operating.Not every problem on the PSAT math section will require a calculator to solve. In fact, all of the math can be done without a calculator; but having the opportunity to add, subtract, multiply, divide, and take roots helps students conserve time. On a timed exam, studies show the students who used calculators did slightly better than those who did not use one. Calculators are likely to improve accuracy and save time in solving problems.While the PSAT currently allows even the most advanced model of graphing calculators, there are some calculation devices students cannot bring to the test. Test-takers are not allowed to use computers, cell phones, adding machines with paper tape, calculators with QWERTY keyboards, or electronic organizers. In addition, calculators with jumbo displaysâ€”those that have characters an inch or more in height that may potentially be seen by other test-takersâ€”require the user to be seated at the discretion of the test supervisor.Students are not allowed to share calculators during the PSAT. In order to insure they have a working calculator for the test, students should make sure their batteries are fresh and their calculator is in good working order. In addition, students are allowed to bring a backup calculator to the test. Having even just a basic, four-function calculator available is preferable to working the entire exam without one.While graphing calculators are permitted during the PSAT, students can successfully complete the test using a calculator without graphing capabilities. If a graphing calculator is not within a family's budget, they should look for a quality scientific calculator, many of which cost under $20.PSAT math questions are designed for test-takers who will be using calculators. While all questions technically are answerable without calculators, students seeking to earn top scores and potentially qualify for National Merit Scholarships will want to be sure to use them. Every student who wants to earn the best scores possible should be sure to understand the guidelines for approved calculators, ensuring a more productive and successful test day. (MORE)

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# HOW DO YOU calculate the concentration of the naoh solution?

Data given Mass =60 gram Formula mass=40 Volume=50 Molality=? m =Mass of solution _________________*Litre Formula mass Volume 60 * 1000 40 500 60000 ____…_ 20000 m=3gram Ans (MORE)

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# What would its new pH be if the concentration of H3O plus ions in the solution were increased by 100 times and why?

Going from right to left, each number on the ph scale represents a 10 fold increase in the concentration of H3O+ ions. For example, water has a ph of 7. Urine has 10 times mo…re H3O+ ions (than water) with a ph of 6. Vinegar has 10,000 more H3O+ ions (than water) with a ph of 3. An increase of 100 times would mean moving left on the ph scale by 2. If you started at say 7.5, subtract 2, to get 5.5. (MORE)

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# Determine the concentration of H3O plus in a solution with a pH of 9.78?

pH = -log [H3O+] [H3O+] = 10^(-pH) [H3O+] = 10^(-9.8) [H3O+] = 1.66x10^(-10) Therefore the concentration of H3O+ in a solution with a pH of 9.8 is …1.66x10^(-10) (MORE)