# sodium sulfate + strontium nitrate

5,779 results, page 14

### biology lab

-rate of photosyhthesis in presence of light intensity & CO2. ~A : sodium bicarbonate in darkness pH b4 xperiment-9 " @ 20 min- 8 " 60 min- 8 ~B: sodium bicarbonate in room light pH b4 xperiment-9 " @ 20 min-9 " 60 min-8 ~C: sodium bicarbonate 20 cm from light source pH b4 ...

### chemistry

Copper(II) nitrate decomposes upon heating to form copper(II) oxide, nitrogen dioxide gas, and oxygen gas. If 1.0 mole of copper(II) nitrate decomposes, how many moles of nitrogen dioxide would be formed?

### Solutions Chem

7) You have a 2.5M solution of Silver Nitrate. It contains 450mL of solution. How many grams of silver would you be able to extract? Cu (s) + 2AgNO3 (aq) -> 2Ag (s) + Cu (NO3)2 (aq) I've gotten this much: M=mol/L 2.5=mol/.45 mol= 2.5*.45 mol=1.125 Silver Nitrate= (Ag=107.9...

### CHEMISTRY HELP

if you have 55.6 grams of nitrate ions in a compound that consists of nitrate ions and plumbous ions, how many grams of the compound do you have? how do i do this problem im completely stuck!?

### Chemistry

How many moles of sodium chloride must be added to an aqueous solution that contains 2.0 moles of silver nitrate in order to precipitate 0.50 moles of silver chloride? A) 0.25 mol B) 0.50 mol C) 1.0 mol D) 2.0 mol E) 1.5 mol The answer is B. I have no idea what to do. I was ...

### Chemistry

Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied the ...

### Biochemistry

Show Calculations used in mkaing 250mL of 0.5M sodium acetate ph 4.7. You are given: 1M acetic acid (weak acid) 1M sodium hydroxide (strong base) Sodium acetate buffer: ph 4.7 acetic acid pKa: 4.7 So far this is what I've gotten: pH = pKa + log (A-/HA-) 4.7=4.7 + log (A-/HA-) ...

### Science

Are any of the bellow chemical changes reversible? If yes, then how? Mixture of Lear Nitrate and Potassium Iodide Mixture of Copper Sulphate Solution and Iron Mixture of Copper Sulphate Solution and Sodium Carbonate Mixture of Dilute Hydrochloric Acid and Magnesium Mixture of ...

### chemistry

What mass, in grams, of sodium hydroxide (NaOH) is produced if 20 grams of sodium metal(Na) reacts with excess water?

### chemistry

What is the pH of a sodium acetate solution prepared by adding 0.820g of sodium acetate to 100.0mL of water at 25 degrees?

### chemsitry

Calculate the mass in grams of sodium bromide, NaBr, are needed to prepare 250.0 mL of a solution of sodium bromide that is 3.50% (m/v).

### Chemistry

What is the mole fraction sodium acetate of a solution made by adding 0.145 g of sodium acetate to 119 ml water?

### Chemistry

The differnece in the mass of 100 moles of each sodium atoms and sodium ions is 5.48002 g. Compute the mass of an electron.

### chemistry

How many grams of sodium hydroxide (NaOH) are needed to prepare 250 mL of a 0.20 M (mol/dm3) sodium hydroxide solution?

### Science

How much quantity of sodium chloride is needed to make 30 ml of a 2% isotonic drug (sodium chloride equivalent 0.20) solution? A. 0.60 B. 0.15 C. 0.27 D. 0.12

### Science

What is the mass percent of sodium hydroxide in a solution that is made by dissolving 8grams of sodium hydroxide in 50 grams of H2O?

### Chemistry

How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?

### Chemistry

Find the molarity of a sodium hydroxide solution obtained by dissolving 125.0 mg of sodium hydroxide in 50.ml volumetric flask.

### chemistry

According to the following reaction, how many grams of copper(II) chloride are necessary to form 0.984 moles silver chloride? silver nitrate (aq) + copper(II) chloride (s) silver chloride (s) + copper(II) nitrate (aq)

### chemistry(reacting masses)

it is given that there are 2moles of nitrate ions and 1.2moles of iron(II)ions in a mixture of iron(II)nitrate and iron(II)carbonate.Calculate the number of moles of carbonate ions.

### biology

Total body sodium content determines extracellular fluid volume, and is regulated by the balance between sodium intake and sodium loss. Oubain is a poison that causes blockage of the Na+/K+ ATPase. Which of the following would occur after administration of oubain? Explain why...

### chemistry

A SOLUTION OF 0.05METER ACID PKA 6.10 IS MIXED WITH AN EQUAL VALUE 0.1 SODIUM SOLUTION OF SODIUM SALT WHAT IS THE PH OF THE FINAL MIXTURE.

### Chemistry

a certain brand of laundry aid called "Oxydoodle" is 12.5% (w/w) sodium percarbonate and 87.5% (w/w) sodium carbonate. Calculate the % (w/w) h2o2 in Oxydoodle

### Chemistry

A student reacts 20.0 grams of sodium hydroxide with hydrochloric acid and obtains 25.0 grams of sodium chloride. What is the percent yield?

### Chemistry

Will a double replacement reaction take place if a solution of sodium hyrdrogen carbonate is added to a solution of sodium chloride?

### CHEMISTRY.

Knowing that bleach contatins 5% aqueous sodium hypocholirte, how much sodium hypochlorite does 700ml of 10% bleach contain? (in grams)

### Chemistry

Suggest chemical tests to identify 3 solid samples of sodium chloride, sodium carbonate and calcium chloride respectively.

### physical science

find the mass of sodium chloride formed when 6.9g of sodium burns in a gas jar filled with chlorine gas.

### Chemistry

if we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be?

### Physical Science

When sodium metal combines with chlorine gas, solid sodium chloride forms. is this a physical or chemical change?

### Chemistry

Calculate the number of moles of sodium oxide, Na2O, that should be produced when 11.50 moles of sodium, Na, react with oxygen gas

### Chemistry

In the reaction of formation of sodium chloride (NaCl), 15 g of sodium is placed in contact with 20 g of chlorine. What is the reactant in excess and its mass in excess?

### Chem

what product could you see in a flask when you cobined copper and sodium. basically what is the name for copper and sodium when combined

### Chemistry

Calculate the amount of sodium acetate trihydrate needed to prepare 100 mL of 0.2M sodium acetate solution.

### chemistry

if 30 grams of sodium (Na reacts completey with 28 grams of water, what is the mass of Sodium hydroxide (NaOH)formed?

### chemistry

if 30 grams of sodium (Na reacts completey with 28 grams of water, what is the mass of Sodium hydroxide (NaOH)formed?

### Chemistry

a solution is 0.0300 m in Sodium. How many grams of sodium carbonate are necessary to prepare 900.0 ml of this solution? I don't know where to start on this.

### science

How many grams of sodium hydroxide is required to neutralize 73 grams of hydrochloric acid and to from sodium chloride and water

### Chemistry

How do you obtain pure crystals of sodium chloride from a mixture of sodium chloride and activated carbon powder

### Physical science

A silver nitrate solution is added to a solution of potassium chloride.the products formed are silver chloride and potassium nitrate 1.which product is a precipitate 2.write down the reaction in a molecular form.indicate states 3.write down the net ionic equation

### CHEM

Consider the following reaction: 3Pb(NO3)2(aq) +Al2(SO4)3(aq) ¡÷ 3PbSO4(aq) + 2Al(NO3)3(aq) Determine the mass (in gram) of lead(II) sulphate (PbSO4) and aluminium nitrate [Al(NO3)3] formed in the solution when 8.84 g of lead(II) nitrate [Pb(NO3)2] was reacted with 6.28 g of...

### Chemistry

When copper wire is placed into a silver nitrate solution, silver crystals and copper(II) nitrate solution form. Write the balanced chemical equation for the reaction. (Type your answer using the format CH4 for CH4.) 1 Cu(s) + 2AgNO3(aq = 2Ag(s) + 1Cu(NO3)2(aq) If a 23.5 g ...

### chemistry

Create balanced equation, given the two compounds in aqueous solution may react with one another. State whether or not a chemical reaction occurs. Make sure to include the state of each reactant and product. If a precipitation reaction occurs, provide the ionic and net ionic ...

### Chemistry

The strontium-87 isotopes stores in the body and decays by the process shown below. The half-life is 2.80hr. Suppose that 0.766 millicuries got into the body. How many mc will remain after 8.40 hr?

### chemistry

#2) Consider the preciditation reaction of a solution containing 3.50 grams of sodium phosphate mixed with a solution containing 6.40 grams of barium nitrate. How many grams of Barium phosphate can form? Ba(NO3 )2 + Na3 PO4 yields Ba3 (PO 4 )2 + NaNO3 #2b) If the actural yield...

### chemistry

If 100 mL of a 3 M solution of sodium hydroxide is diluted to a total volume of 600 mL with distilled water, what will the final concentration of sodium hydroxide be?

### chemistry

10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?

### chemistry

10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?

### chemistry

If you wanted to hydrolyze 1 mole of PLA into 1 mole of sodium lactic acid, how many moles of sodium hydroxide would you need?

### chemistry

A solution was prepared by adding 0.5283 g of sodium hydroxide to a 50 mL volumetric flask. What is the concentration of sodium hydroxide in moles per liter?

### chemistry

A solution was prepared by adding 0.5283 g of sodium hydroxide to a 50 mL volumetric flask. What is the concentration of sodium hydroxide in moles per liter?

### Chemistry

How many grams of chlorine are required to react completely with 5.00 grams of sodium to produce sodium chloride ? 2na + cl2 → 2nacl

### chemistry

explain whether using solid sodium hydroxide pellets rather than aqueous sodium hydroxide would alter the enthalpy

### science

Ravi prepared a solution of sodium chloride by mixing 5.85g of salt in 1l of water.Find molar mass of sodium chloride?

### science

Are the following data sets on chemical changes consistent with the law of conservation of mass? (a) A 15.0 g sample of sodium completely reacts with 19.6 g of chlorine to form 34.6 g of sodium chloride. the answer is yes, because 15 and 19.6 add up to 34.6 right?

### science

1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get this answer. I've looked it up and stuff, but I just found the answer not how to know what it is. A link or explanation would be greatly appreciated. Thanks.

### chemistry

An ice-bath made with sodium chloride will be 9 ± 1 oC when the solution is about 23% sodium chloride by mass. The density of solid sodium chloride is about 2 g/cm3. What volume of solid NaCl would you add to 200 g water to make a 23% NaCl solution? ANY HELP WOULD BE AWESOME!...

### Chemistry Gd 11

How many moles of chlorine gas would reacht with 10 moles of sodium to form sodium chloride?

### Chemistry

4.00 g dm^-3 of impure sodium carbonate is used in a titration. What could have caused the impurity in the sodium carbonate?

### chem 4

How many grams of sodium chloride are needed to make 1 L of 0.9% (m/v) sodium chloride solution (“isotonic saline”).

### Chemistry

4.5 moles of oxygen reacting with enough sodium will form how many moles of sodium oxide? How do you solve?

### college chemistry

10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?

### college chemistry

10.0 mL of 0.15M of sulfuric acid is titrated with 0.05M of sodium hydroxide. how many mL of sodium hydroxide solution are required to reach the equivalence point?

### Chemistry

What mass in grams of a 0.500 m(molal) solution of sodium acetate, CH3CO2Na, in water would you use to obtain 0.200mol of sodium acetate?

### Chemistry

A given solution contained potassium chloride, KCl, and hydrochloric acid. 25 cm3 of it needed 24.80 cm3 of 0.0986 M sodium hydroxide solution to neutralize the acid, and the neutral solution then required 23.55 cm3 of 0.2 M silver nitrate, AgNO3, solution to precipitate all ...

### Chemistry

Consider a 1.50-g mixture of magnesium nitrate and magnesium chloride. After dissolving this mixture in water, 0.500M of silver nitrate is added dropwise until precipitate formation is complete. The mass of the white precipitate formed is 0.641 g. Calculate the mass percent of...

### chemistry

what is the concentration of the hydroxide ion in a solution if .12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

### chemist

What is the concentration of the hydroxide ion in a solution if 0.12 mol of strontium hydroxide are dissolved in water and the final solution volume is 500. mL?

### CHEMISTRY

Which of the following solutions contain the greatest total ion concentration? a) one mole of potassium chloride dissolved in 1.0L of solution b)one mole of sodium phosphate dissolved in 1.0L of solution c)one mole of ammonium carbonate dissolved in 1.0L of solution d) one ...

### CHEMISTRY

Which of the following solutions contain the greatest total ion concentration? a) one mole of potassium chloride dissolved in 1.0L of solution b)one mole of sodium phosphate dissolved in 1.0L of solution c)one mole of ammonium carbonate dissolved in 1.0L of solution d) one ...

### chemistry

3. A solution is made by dissolving 5.00 g of impure sodium hydroxide in water and making it up to 1.00dm3 of solution. 25.0 cm3 of this solution is neutralized by 30.0 cm3 of hydrochloric acid of concentration 0.102 mol/dm3. a) Calculate the number of mole of HCl. b) ...

### chemistry

What is the sum of the coefficients (including “1”) of the balanced equation? __CaCO3 + __NaF __ CaF2 + __Na2CO3 4 5 6 7 8 If you start with 20.0 grams CaCO3, how many moles of CaCO3 do you have? 20.0 2.00 .200 .0200 .0386 If you start with .500 moles of NaF, how many ...

### chemistry

Barium Nitrate is a not very soluble nitrate. Calculate the Ksp (at 25 degrees) from the following ΔG's: Ba2+ = -561kj/mole NO3 1- = - 109kj/mole Ba(NO3)2 = - 797 kj/mole I did the first step and I ended up with dGrxn = -127 kj/mol. When I plugged it into the second ...

### Chemistry

1. Which of the following metals is oxidized by calcium ions? *potassium zinc iron lead 2. The first electrochemical cell was invented by ____. Michael Faraday *Alessandro Volta James Maxwell Benjamin Franklin 3. Why can't a lead storage battery be recharged indefinitely? A ...

### Chemistry

The strontium-90 isotope decays by the reaction below. It has a half-life of 28 yr. If the initial activity of this isotope was 168dpm, what would the activity be after 28.0 yr?

### chemistry Please who helps me stpe by step

2gm of mixture hydrated sodium carbonate na2c03 /OH20 and sodium bicarbonate was dissolved in water and made up to 250cc. 25cc of this solution was titrated, using methyl orange as indicator and 22.5cc of 0.087N hcl were required for neutralization. Calculate the percentage of...

### chemistry

Sodium chloride is decomposed into the elements sodium and chlorine by means of electrical energy. How many grams of chlorine gas can be obtained from 2.50 mol NaCl?

### science(chemistry)

why sodium carbonate against hydrochloric acid titration using phenolphthalein indicator does not go to completion but stops at the sodium hydrogen carbonate stage.

### Chemistry

It requires 37.0 mL of a sodium hydroxide soltution to neutralize 0.75 grams of phosphoric acid. Using a balanced equation, determine the concentration of the sodium hydroxide solution.

### chemistry

The directions state "weigh about 5 grams of sodium chloride". Give minimum and maximum amounts of sodium chloride that would satisfy these instructions.

### chem

solution of 0.148 M sodium iodide for an experiment in lab, using a 500 mL volumetric flask. How much solid sodium iodide should you add

### Chemistry

What is antacid? Why is sodium hydrogen carbonate an effective antacid but sodium hydroxide is not? Thx~

### chemistry

how many grams of sodium chloride do you need to prepare 250 mL of a 5.00% sodium chloride solution?

### La Salle

How many grams of sodium chloride do you need to prepare 250 mL of a 5.00% (w/v) sodium chloride solution?

### chemistry

How many grams of sodium chloride do you need to prepare 250 mL of a 5.00%(w/v) sodium chloride solution

### chemistry

what weight of sodium hydroxide(NaOH) is required to make 20ml of 5% (w/v) sodium hydroxide?

### Science

what mass of sodium carbonate is present in a 3000cc of a 1.2 solution? The density of the sodium carbonate is 1.5 g/ml.

### Chemistry

how many moles of sodium oxide are produced when 3.9 moles of of sodium combine with excess oxygen

### chemistry

Find volume (in ml) of 0.3 M solution of sodium chloride containing exactly 3.0g of sodium chloride.

### science

5% w/v aqueous sodium chloride from this i have to prepare 1.6% w/v aqueous sodium hydroxide solution

### Chemistry

Sodium chloride dissolves in water (solubility in water is 361g/1L), but copper (II) phosphate does not dissolve in water (insoluble). A. Describe in a stepwise fashion how the solid sodium chloride dissolves in the water to form a solution. (name the resulting interparticle ...

### chemistry

If you begin with 0.345 moles of Calcium Nitrate,how many moles of Potassium Phosphate were needed? How many moles of Potassium Nitrate and Calcium Phosphate are produced?

### science

when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?

A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 salt is 1.577 g. Calculate the percent by mass of water in the hydrated calcium sulfate salt. ...

### Chem

Is sodium benzoate soluble in HCl? I put yes What about NaOH? It's supposed to be created from a reaction with benzoic acid and NaOH What about NaHCO3? And aq. sodium benzoate plus HCl? And aq. sodium benzoate plus NaOH?

### chemistry

If 16.9 g sodium carbonate is obtained from the thermal decomposition of 75.0 g of sodium hydrogen carbonate according to the unbalanced equation, NaHCO3 ¨ Na2CO3 + H2O + CO2 What is the percent yield?

### chemistry

Calculate the residence time of sodium in millions of years if the total amount of sodium in the oceans is 1.5 x 10 to the 22 grams, and is supplied to the ocean at a rate of 2.2 x 10 to the 14 grams per year.

### chemistry

sodium metal dissolves im liquid mercury to form of NA(s) and Hg(l) are 0.97 g/ml and 13.6 g/ml respectively. a sodium amalgoum is made by dissolving 10 ml Na (s) in 20.0 ml Hg (l). The final volume of solution is 21.0 ml. Calculate the molarity of Na in the solution.

### science

sodium is a metal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine combine, it produces edible table salt. What can be concluded?

### CHEMISTRY

How many liters of softened water, containing a sodium concentration of 0.050% sodium by mass, have to be consumed to exceed the FDA recommendation? (Assume a density of 1.0 g/mL for water.)